[docs] Some user-friendly changes to the documentation.

 - Added parmalinks (closes #1527)
 - Changed the 'fork us on github' button to 'Edit this page on github', so people can edit quickly (closes #1532)
- Changed the favicon
Merge remote-tracking branch 'dotcloud/master' into docs-smart-changes

Conflicts:
	docs/sources/conf.py
Resolved conflict in conf.py

ps. also changed navigation (swapped community and getting started)
Merge pull request #1533 from dhrp/docs-ux-changes

Docs ux changes