Extended Team class to ability add other teams.

People can use this syntax
@developers = someuser @admins

Signed-off-by: Kristián Feldsam <feldsam@gmail.com>
Extended Gitolite class by import method.

I add ability to load gitolite.conf file and import it. You can call import method after basic "set" methods.

Signed-off-by: Kristián Feldsam <feldsam@gmail.com>