Closes #1932.

Resolves #1673.

Because since project always belongs to namespace it dont need such
strict restrictions any more

Also add ability to render "service.help" in markdown

The API documentation says:

"You can search for groups by name or path with: /groups?search=Rails"

But you can't because the search query only checks the name, not
the path. This fixes that.

* cache user contributions for day
* ignore forks in calendar contribtuions

Abstracts away the lower-level implementation details from the
Repository model.

Added tests and updated docs. Also adding 'user_id' field in the hooks for adding/removing user from team.

adding avatar to project settings page added avatar removal show project avatar on dashboard, projects page, project page added rspec and feature tests added project avatar from repository new default project icon added added copying af avatar to forking of project added generated icon fixed avatar fork hound fix style fix test fix