docs: Adding some initial documentation.

Based off the prjxray docs.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
diff --git a/docs/.gitignore b/docs/.gitignore
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+++ b/docs/.gitignore
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+_build
+tests/*.md
diff --git a/docs/Makefile b/docs/Makefile
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+++ b/docs/Makefile
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+# Minimal makefile for Sphinx documentation
+#
+
+MAKEDIR := $(dir $(lastword $(MAKEFILE_LIST)))
+
+# You can set these variables from the command line.
+SPHINXOPTS      =
+SPHINXBUILD     = [ -e venv/bin/activate ] && source venv/bin/activate; sphinx-build
+SPHINXAUTOBUILD = [ -e venv/bin/activate ] && source venv/bin/activate; sphinx-autobuild
+SPHINXPROJ      = SymbiFlowV2X
+SOURCEDIR       = .
+BUILDDIR        = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+livehtml:
+	@$(SPHINXAUTOBUILD) -b html --ignore \*.swp --ignore \*~ $(SPHINXOPTS) "$(SOURCEDIR)" "$(BUILDDIR)/html"
+
+.PHONY: help livehtml Makefile
+
+venv:
+	rm -rf venv
+	virtualenv --python=python3 venv
+	source venv/bin/activate; pip install -r requirements.txt
+
+.PHONY: venv
+
+# Update fuzzer / minitest markdown links.
+tests-links:
+	@mkdir -p $(MAKEDIR)/tests
+	@cd $(MAKEDIR)/tests && rm -f *.md
+	@cd $(MAKEDIR)/tests && \
+		for i in ../../tests/*; do \
+			n=$$(basename $$i | sed -e's/^[0-9][0-9][0-9]-//'); \
+			if [ ! -d $$i ]; then \
+				continue; \
+			fi; \
+			if [ -e $$i/README.md ]; then \
+				echo "Linking $$i/README.md"; \
+				ln -s $$i/README.md $${n}.md; \
+			else \
+				echo "Missing $$i/README.md"; \
+			fi; \
+		done
+
+links: tests-links
+	@true
+
+.PHONY: tests-links links
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile links
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/_static/.keepme b/docs/_static/.keepme
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/docs/_static/.keepme
diff --git a/docs/conf.py b/docs/conf.py
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+++ b/docs/conf.py
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+# -*- coding: utf-8 -*-
+#
+# SymbiFlow V2X documentation build configuration file, created by
+# sphinx-quickstart on Mon Feb  5 11:04:37 2018.
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import re
+
+# Markdown support
+import recommonmark
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import sys
+sys.path.insert(0, os.path.abspath('.'))
+from markdown_code_symlinks import LinkParser, MarkdownSymlinksDomain
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.autosummary',
+    'sphinx.ext.doctest',
+    'sphinx.ext.imgmath',
+    'sphinx.ext.napoleon',
+    'sphinx.ext.todo',
+    'sphinx_markdown_tables',
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+source_suffix = ['.rst', '.md']
+source_parsers = {
+    '.md': 'markdown_code_symlinks.LinkParser',
+}
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = u'SymbiFlow Verilog to XML (V2X)'
+copyright = u'2018, SymbiFlow Team'
+author = u'SymbiFlow Team'
+
+# Enable github links when not on readthedocs
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+if not on_rtd:
+    html_context = {
+        "display_github": True,  # Integrate GitHub
+        "github_user": "symbiflow",  # Username
+        "github_repo": "python-symbiflow-v2x",  # Repo name
+        "github_version": "master",  # Version
+        "conf_py_path": "/doc/",
+    }
+else:
+    docs_dir = os.path.abspath(os.path.dirname(__file__))
+    print("Docs dir is:", docs_dir)
+    import subprocess
+    subprocess.call('git fetch origin --unshallow', cwd=docs_dir, shell=True)
+    subprocess.check_call('git fetch origin --tags', cwd=docs_dir, shell=True)
+    subprocess.check_call('make links', cwd=docs_dir, shell=True)
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The full version, including alpha/beta/rc tags.
+release = re.sub('^v', '', os.popen('git describe ').read().strip())
+# The short X.Y version.
+version = release
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = None
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This patterns also effect to html_static_path and html_extra_path
+exclude_patterns = ['_build', 'venv', 'Thumbs.db', '.DS_Store']
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'default'
+
+# If true, `todo` and `todoList` produce output, else they produce nothing.
+todo_include_todos = True
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'sphinx_materialdesign_theme'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#
+html_theme_options = {
+    # Specify a list of menu in Header.
+    # Tuples forms:
+    #  ('Name', 'external url or path of pages in the document', boolean, 'icon name')
+    #
+    # Third argument:
+    # True indicates an external link.
+    # False indicates path of pages in the document.
+    #
+    # Fourth argument:
+    # Specify the icon name.
+    # For details see link.
+    # https://material.io/icons/
+    'header_links': [
+        ('Home', 'index', False, 'home'),
+        ("GitHub", "https://github.com/SymbiFlow/python-symbiflow-v2x", True, 'link')
+    ],
+
+    # Customize css colors.
+    # For details see link.
+    # https://getmdl.io/customize/index.html
+    #
+    # Values: amber, blue, brown, cyan deep_orange, deep_purple, green, grey, indigo, light_blue,
+    #         light_green, lime, orange, pink, purple, red, teal, yellow(Default: indigo)
+    'primary_color':
+    'deep_purple',
+    # Values: Same as primary_color. (Default: pink)
+    'accent_color':
+    'purple',
+
+    # Customize layout.
+    # For details see link.
+    # https://getmdl.io/components/index.html#layout-section
+    'fixed_drawer':
+    True,
+    'fixed_header':
+    True,
+    'header_waterfall':
+    True,
+    'header_scroll':
+    False,
+
+    # Render title in header.
+    # Values: True, False (Default: False)
+    'show_header_title':
+    False,
+    # Render title in drawer.
+    # Values: True, False (Default: True)
+    'show_drawer_title':
+    True,
+    # Render footer.
+    # Values: True, False (Default: True)
+    'show_footer':
+    True
+}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# Custom sidebar templates, must be a dictionary that maps document names
+# to template names.
+#
+# This is required for the alabaster theme
+# refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars
+html_sidebars = {
+    '**': [
+        'relations.html',  # needs 'show_related': True theme option to display
+        'searchbox.html',
+    ]
+}
+
+# -- Options for HTMLHelp output ------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'symbiflow-v2x'
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    (
+        master_doc, 'SymbiFlowV2X.tex', u'SymbiFlow V2X Documentation',
+        u'SymbiFlow Team', 'manual'),
+]
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    (master_doc, 'symbiflow-v2x', u'SymbiFlow V2X Documentation', [author], 1)
+]
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    (
+        master_doc, 'SymbiFlowV2X', u'SymbiFlow V2X Documentation', author,
+        'SymbiFlowV2X', 'One line description of project.', 'Miscellaneous'),
+]
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {'https://docs.python.org/': None}
+
+
+def setup(app):
+    github_code_repo = 'https://github.com/SymbiFlow/python-symbiflow-v2x/'
+    github_code_branch = 'blob/master/'
+
+    docs_root_dir = os.path.realpath(os.path.dirname(__file__))
+    code_root_dir = os.path.realpath(os.path.join(docs_root_dir, ".."))
+
+    MarkdownSymlinksDomain.init_domain(
+        github_code_repo, github_code_branch, docs_root_dir, code_root_dir)
+    MarkdownSymlinksDomain.find_links()
+    app.add_domain(MarkdownSymlinksDomain)
+    app.add_config_value(
+        'recommonmark_config', {
+            'github_code_repo': github_code_repo,
+        }, True)
diff --git a/docs/index.rst b/docs/index.rst
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+.. SymbiFlow V2X documentation master file
+
+Welcome to SymbiFlow Verilog to XML
+=========================================
+
+`SymbiFlow Verilog to XML`_ `V2X`_ .
+
+.. _SymbiFlow Verilog to XML: https://github.com/SymbiFlow/python-symbiflow-v2x
+.. _V2X: http://symbiflow-v2x.readthedocs.io/
+
+.. toctree::
+   :maxdepth: 2
+   :glob:
+   :caption: Tests
+
+   tests/**
diff --git a/docs/requirements.txt b/docs/requirements.txt
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+++ b/docs/requirements.txt
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+sphinx_materialdesign_theme
+
+docutils
+sphinx
+sphinx-autobuild
+
+breathe
+recommonmark
+sphinx-markdown-tables
+sphinxcontrib-napoleon
+
+# Markdown cross-reference solver library
+git+https://github.com/SymbiFlow/sphinxcontrib-markdown-symlinks