Migrate documentation from wiki to readthedocs

The documentation on the wiki has been moved into the codebase
and converted from markdown to reStructuredText. No additional
changes to the content of the documentation has been made.
Set project name to "PRAW"
Pylint fixes in conf.py
Use True over true in docstring.
Update CHANGES.rst to PRAW 2.0.12
Reuse README.rst in index.rst
Add full karma program to getting_started.
Update contributer guidelines
Update configuration files
Smaller grammatical and other fixes.
Update getting_started with api delay algoritm.
Add direct link to license.
Use pprint in introspection example.
Clarify installation. Remove "setup.py" method.

If neither pip nor easy_install is installed then dependencies
will not be automatically installed with the setup.py method.
This will give importErrors when trying to run PRAW. Only
beginners have a python installation without pip or easy_install,
suggesting setup.py as an installation method for them will only
cause problems.
Update comment parsing with 2.0 changes
Rephrase documentation
Fix spelling mistakes with requiring.
Add support section.
Add faq
Rename, move and update code_overview.