Add favorites view controller and its tab to home screen.
Merge branch 'master' of https://github.com/opfo/app into feature/tabbed-homescreen

* 'master' of https://github.com/opfo/app:
  Some cosmetic changes
  Some cosmetic changes
  Safari is opened when a user's website is clicked
  Implemented the heat mode functionality in the QuestionsView, score>0 is colored green, score==0 is colored yellow and score<0 is colored red
  Add opening of user website in profile list.
  Fix profile view to handle unspecified fields.
  Fix header alignments and icon sizes.
  Add scrolling to comment body.
  Add OPFPost.title spec, remove non building user view count spec.
  Implemented the heat mode functionality in the QuestionsView, score>0 is colored green, score==0 is colored yellow and score<0 is colored red

Conflicts:
	Code Stream.xcodeproj/project.pbxproj
Merge branch 'feature/tabbed-homescreen'

* feature/tabbed-homescreen:
  Add favorites view controller and its tab to home screen.