Fix Reward model.

Add project_reward table.
Fix Article model.

Rename model Artikel to Article.

Change tabs to spaces.
Fix circle link to project.

Replace proyek with project.
Tidy up User controller and view a little.

Move some code fragments from controller to view.
Make more dummy data.

Set tipping points to two thirds.

Enlarge donations so that progress is more visible.

Set project expiration to 60 days from approval time.

Add project rewards.

Add articles.

Index project on author_id.
Fix progress bar fill and tipping point display.
Display the number of days remaining in project.
Display a list of recent articles.
Add feature: find user by name.
Display rewards in project profile.
Fix some scripts.
Add login_provider and login_provider_uid to User.

Anticipate using HybridAuth for authentication
by Facebook, Twitter, or whatever.
Display collaborators in project profile.

Add dummy collaborations.
Add approved project count in user profile.
Escape author name in project profile.