Projects list on profile page

[pivotal tracker story 64891388)[https://www.pivotaltracker.com/story/show/64891388]
- added acceptance tests for displaying a project list on a users profile page
- added view specs for this feature `/views/users/show.html.erb_spec.rb`
- added controller specs for assignment of followed projects to instance var
- inserted one liner into `user_controller.rb` to achive the above
- added block to view `/app/views/users/show.html.erb` to display the list of projects
- merged most recent changes from upstream