Added .travis.yml script to the project

Signed-off-by: Grzegorz Latosinski <glatosinski@antmicro.com>

.travis.yml

diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..d5791ae
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,17 @@
+language: python
+
+matrix:
+  include:
+    - python: 3.5
+      env: TOXENV=py35
+    - python: 3.6
+      env: TOXENV=py36
+    - python: 3.7
+      env: TOXENV=py37
+
+install: pip install tox
+
+script: tox
+
+notifications:
+  email: false