Move environment.yml to top level directory.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

environment.yml

diff --git a/conf/environment.yml b/environment.yml
similarity index 90%
rename from conf/environment.yml
rename to environment.yml
index fcdf0c1..41e70a8 100644
--- a/conf/environment.yml
+++ b/environment.yml
@@ -2,6 +2,7 @@
 channels:
   - symbiflow
 dependencies:
+  - python
   - symbiflow-yosys
   - pip:
     - tox

prepareenv.sh

diff --git a/prepareenv.sh b/prepareenv.sh
index 0ff3322..238f04c 100755
--- a/prepareenv.sh
+++ b/prepareenv.sh
@@ -15,6 +15,6 @@
 conda config --set always_yes yes --set changeps1 no
 conda install -q setuptools
 conda update -q conda
-conda env create --file conf/environment.yml
+conda env create --file environment.yml
 conda config --set env_prompt '({name})'
 conda activate yosys-env