update vx-builder gem
add last_month to company usage
update vx-builder gem
update vx-builder gem
fixed \\r control code in terminal
update rails to 4.0.8
update vx-builder gem
User can unsubscribe from project

* using uuid as pk in project_subscriptions
* add uuid and sha constrant restrictions to routes
* create controller users/project_subscriptions
redirect to "Add Project" page if user has no projects
update add project page
update user_repos page
add spinner to job page
load more builds, display builds in table
ui fixes:

* truncate builds list after reinitialize BuildsCtrl
* filter by subscription in user_repos
* load more in user_repos