python-terraform-1 Make option with bool value/ more sense for the caller

try tox on travis

.travis.yml

@@ -17,14 +17,12 @@ before_script:
 
 install:
   - "curl https://bootstrap.pypa.io/ez_setup.py -o - | python"
-  - "pip install pytest"
+  - "pip install tox-travis"
   - "pip install ."
 # command to run tests
 script:
   - "export PATH=$PATH:$PWD/tf_bin"
-  - cd test
+  - tox
-  - py.test
-  - cd ..
 
 deploy:
   # test pypi

tox.ini

@@ -1,6 +1,11 @@
 # content of: tox.ini , put in same dir as setup.py
 [tox]
-envlist = py27, py3
+envlist = py27, py35
 [testenv]
 deps=pytest
-commands=py.test test
+commands=py.test test
+
+[travis]
+python =
+  2.7: py27
+  3.5: py35