Change .travis.yml

Author: harshildarji

.travis.yml

@@ -1,10 +1,11 @@
 language: python
 python:
-  - "2.6"
-  - "2.7"
   - "3.2"
   - "3.3"
   - "3.4"
   - "3.5"
-install: "pip install pytest pytest-cov"
+install: 
+  - if [ "$TRAVIS_PYTHON_VERSION" == "3.2" ]; then travis_retry pip install coverage==3.7.1; fi
+  - if [ "$TRAVIS_PYTHON_VERSION" != "3.2" ]; then travis_retry pip install coverage; fi
+  - "pip install pytest pytest-cov"
 script: py.test --doctest-modules --cov ./