Merge pull request #128 from methane/travis/cython-0.22

travis: Use cython 0.22

Author: methane

.travis.yml

@@ -7,6 +7,10 @@ language: python
 python:
     - 2.7
 
+branches:
+    only:
+        - master
+
 env:
     - TOXENV=py26-c,py27-c
     - TOXENV=py32-c,py33-c,py34-c
@@ -17,8 +21,8 @@ env:
 install:
     - pip install wheel tox
     - ls -la wheelhouse
-    - if [ ! -f wheelhouse/Cython-0.21.2-cp27-none-linux_x86_64.whl ] ; then pip wheel cython ; fi
-    - pip install wheelhouse/Cython-0.21.2-cp27-none-linux_x86_64.whl
+    - if [ ! -f wheelhouse/Cython-0.22-cp27-none-linux_x86_64.whl ] ; then pip wheel cython==0.22 ; fi
+    - pip install wheelhouse/Cython-0.22-cp27-none-linux_x86_64.whl
     - cython --cplus msgpack/_packer.pyx msgpack/_unpacker.pyx
 
 script: tox