Add missing tests.rst to docs/, minor fixes to rest
Use correct repo name for title
Fix missing/incorrect author_name substitutions

Includes cherry-pick of https://github.com/pydanny/cookiecutter-django/commit/d3d8e1147c0ba85fef0ad326609329ddd8fca50e
for CONTRIBUTORS.txt in generated repo.
Merge pull request #4 from dupuy/master

Fix small issues (mostly substitutions) in cookiecutter template