Add a sixth tutorial: The Testing Game
Add coverage example
Add more details to testing game tutorial
Update grammar of testing intro
Add some test coverage explanation
corrected typos, created htmlcov/index.html file and image file for this report, wrote on html coverage report
Remove htmlcov directory

This directory should not be stored under version control.  It is a
directory of meta content generated based on our code so it would be
listed in a .gitignore in a real project.
Touch up branch coverage HTML report explanations
Note good coverage is necessary but not sufficient
Improve spacing
Split sixth tutorial into two parts
Inspect our suboptimal coverage report
Fix some reStructuredText bugs in the testing game tutorial
Link to new tutorials in index file
Fix some of the copy in the gravatars tutorial
Fixing grammar
Make the index.html replacement even more clear
Corrected tutorial link to point to current tutorial version
Minor code style nitpick
Added links to Django docs