add travis

.travis.yml

@@ -0,0 +1,13 @@
+language: python
+python:
+  - "2.7"
+  - "3.4"
+install:
+  - pip install tox-travis
+script:
+  - tox
+
+notifications:
+  email:
+    on_success: never
+    on_failure: change

tox.ini

@@ -4,12 +4,17 @@ max-line-length=100
 exclude=.svn,CVS,.bzr,.hg,.git,__pycache,.venv,.cache,todotxt_machine/test/*
 
 [tox]
-envlist = py27,py35
+envlist = py27,py35,py34,flake8
 
 [testenv]
 passenv=*
 deps=pytest
-commands=flake8
-    py.test
+commands=py.test
 
+[testenv:flake8]
+deps = flake8
+commands = flake8
 
+[tox:travis]
+2.7 = py27
+3.4 = py34, flake8