Project landing template

contributors @christophermlne, @tochman

Notes
- extensively reworked and refactored project landing page
- new field for marketing content (pitch:text)
  - still needs to be connected to the mercury editor
- styling fixes
- new project actions drop-down UI element
- new join project button
- new project sidebar with widgets
- moved first 5 members to project sidebar
  - this is setting us up to expose project leadership roles in sidebar as per the lofi
  - full project members list available in modal overlay

User Story: https://www.pivotaltracker.com/story/show/77280446
Lofi: https://docs.google.com/file/d/0B9FqKjpP8_MUMnRVQ2VfNkVzUGs/edit
Heroku instance: http://enigmatic-lake-8055.herokuapp.com/projects/websiteone
(log in as random@random.com | randomrandom to join/leave websiteone project)
![skarmavbild 2014-09-14 kl 12 27 02](https://cloud.githubusercontent.com/assets/5248170/4263702/bd913a2e-3bf9-11e4-9dd3-e3adfc487c60.png)
![skarmavbild 2014-09-14 kl 12 28 28](https://cloud.githubusercontent.com/assets/5248170/4263705/edd81680-3bf9-11e4-9aab-6a0bc61ad08b.png)

using FactoryGirl.create_list(:user, num.to_i, follow_project: project) would be appropriate