Before we have only owner_id to determine group owner
With multiple owners per group we should get rid of owner_id in group.
So from now @group.owner will always be nil but
@group.owners return an actual array of users who can admin this group

Conflicts:
	lib/tasks/gitlab/check.rake

PivotalTracker Source Commits Endpoint

Added search for projects by name to api

Remove -y option when removing ruby1.8

* Hooks and team pages allowed only for masters/owners
* Group page allowed for admin
* Corrent authentication for Projects controller
* Hide some project elements from visitor

* Render right layout depends on current_user
* show sample git username/email when repo is empty
* Show extra info when browsing public area
* Fixed some tests related to public projects
* show comments in read-only for public projects
* Remove old public routing

Change-Id: I1bdd3608d3b46924b5da3ae282c99f85ee4e0dab