Run tests under Travis CI

Another attempt at intake#17

Author: cclauss

.travis.yml

@@ -0,0 +1,26 @@
+group: travis_latest
+language: python
+cache: pip
+python:
+  - "2.7"
+  - "3.5"
+  - "3.6"
+  - "pypy"
+  - "pypy3"
+addons:
+  apt:
+    packages:
+    - libsnappy-dev
+install:
+  #- pip install python-snappy
+  - pip install -e
+  - pip install flake8 nose2 pytest
+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:
+  - pytest 
+  - nosetests test_snappy.py
+  - if [[ $TRAVIS_PYTHON_VERSION == pypy  ]]; then nosetests test_snappy_cffi.py; fi