Commented YAML and put version on one line

Author: Richienb

.travis.yml

@@ -1,15 +1,20 @@
+# Disable sudo to speed up the build
 sudo: false
 
+# Set the build language to Python
 language: python
 
-python:
- - 2.7
+# Set the python version to 2.7
+python: 2.7
 
+# Install the codecov pip dependency
 install:
  - pip install codecov
 
+# Run the unit test
 script:
  - coverage run tests.py
 
+# Push the results back to codecov
 after_success:
  - codecov