Make GitlabProjects#create_hooks a class method
Make support/rewrite-hooks.sh use bin/create_hooks
 Merge branch 'create_hooks' into 'master'

Add bin/create-hooks command for backup restores

This solves the problem that `support/rewrite-hooks.sh` assumes that the gitlab-shell is installed in `/home/git/gitlab-shell`, which does not hold for omnibus-gitlab.
Merge branch 'master' of github.com:gitlabhq/gitlab-shell

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Conflicts:
	support/rewrite-hooks.sh