Add git repo for websites

Add a git repository for users who want it, so that they(we) can push changes easier, and it would be easier if you're working in a team.

Basically, if the user requests it, the system should automatically create a git repository for their website, and then ask the user for his key(for security), then give the user the repos address. and the user can add more keys for e.x. team members later.

[JJE-Admin]

Not sure if this is possible, but I guess we could try.
Assigning milestone.