Enable travis caching for pip cache

methane · methane · commit bc879f35c77d · 2015-03-25T04:23:10.000+09:00
Ref http://docs.travis-ci.com/user/caching/#pip-cache
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,7 @@
 language: python
 python: 2.7
 sudo: false
+cache: pip
 env:
   matrix:
   - TOX_ENV=py26
