adding stream partial
added username at the top of the idea UI.
Merge branch 'master' into C4_Hesham_36_IdeaStream
#88, infinite scrolling
#88, added documentation
.
Removed sausage.js plugin and finished the IdeaStream UI #36.
Added UML #88
Merge branch 'C4_Hesham_36_IdeaStream' into C4_Gezeery_#52_view_user_profile

Conflicts:
	Idearator/Gemfile
	Idearator/Gemfile.lock
	Idearator/app/models/idea.rb
	Idearator/lib/tasks/populate.rake