Adds Shotgun for development
Introduce User#single_access_token
Adds login_from_token
Enables /api/v1/projects.json
Enables /api/v1/projects/:id/builds.json

This endpoint allows to build the current HEAD of the project
Adds the token to top bar
Adds task to populate User#single_access_token
Merge branch 'ht' into enable-api-projects-management

Conflicts:
	public/stylesheets/housetrip.css
Rename User#single_access_token to #api_key
Merge pull request #68 from pedrocunha/enable-api-projects-management

Enable API projects management