Disable 3.5 for nonw. Pip broken as hell - it doesn't install sdists …

…built on py3 and travis just can't preinstall 3.5.

.travis.yml

@@ -1,5 +1,5 @@
 language: python
-python: '3.5'
+python: '2.7'
 sudo: false
 env:
   global:
@@ -18,12 +18,8 @@ env:
     - TOXENV=3.4-cover,coveralls,codecov
     - TOXENV=3.4-nocov
 
-    - TOXENV=3.5-cover,coveralls,codecov
-    - TOXENV=3.5-nocov
-
     - TOXENV=pypy-cover,coveralls,codecov
     - TOXENV=pypy-nocov
-
 before_install:
   - |
     if [[ "${TOXENV}" = "examples" ]]; then