removed weird language about power
cleaned up project_overview formatting
improved readability of project_overview.rst
made 'getting started' section, moved relevant files
renamed dir to advanced, edited index, added bug_tracker info
minor updates to index.rst
restructured dir, updated index.rst
updated index.rst to reflect new structure
combined contact with chat_on_irc
updated links w/in files to reflect new structure
Merge pull request #158 from shaunagm/master

editing structure of docs

Partially following discussion from https://etherpad.mozilla.org/zKDtgfoUuD ; more work remains.