Create .travis.yml (#82)

Author: cclauss

.travis.yml

@@ -0,0 +1,23 @@
+language: python
+matrix:
+  include:
+    - python: 2.7
+    - python: 3.6  
+  allow_failures:
+    - python: 3.6
+install:
+  - pip install --upgrade pip
+  - pip install -r requirements.txt
+  - pip install flake8
+before_script:
+  # stop the build if there are Python syntax errors or undefined names
+  - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics
+  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
+  - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+script: true  # pytest
+notifications:
+  email: false
+  slack:
+    secure: kDWVy90sDY+o3g0/ZTGX2D+PTbzhtd74Whe1AJHhcUDobTUzkch8GtY9eZxybZk4nga9lQxL6YeJ72SfBBEPaLzXcUMe0YcNaBydkQHcipKZn+Vcb8kf2FiZC6YwsUYfTvvH9MPLbkZOZvsNyd0h85z+hYMB8jHsq6Yn5gf79BA=
+    on_failure: always
+    on_success: change