Make knowledgebase project-dependant
Routes, AUTHORS and README updates
Merge remote-tracking branch 'upstream/master' into 3.x-testing

Conflicts:
	app/controllers/categories_controller.rb
fix up my mess
Enable watchers on categories and articles
Implement acts_as_activity_provider
added 3.0.0-devel version to identifier
fixed routing to properly use the /knowledgebase scope within a project
fixed article rating due to scope change
tagging 3.0.0-devel1

This is an extension of @duanejevon's work in #119, but also potentially touches on:

* #100 (new scopes may address sub-uri issues)
* #41 (3.x branch is EXCLUSIVELY project-based)
* #97 (basic "watch" functionality has been added)
* #11 (since we're no longer global, the initial release should fully support proper searching)
remove breakpoint
Remove knowledgebase controller
Fix jump-to-category after URL change
enable textile rendering for article summary
Fix searching for per-project model
Fix find_project hack with more elegant solution
Add icons to activity page
Merge remote-tracking branch 'duanejevon/3.x-devel' into 3.x-devel
Add a new front page
Front page stylesheet stuff