URL Service and Site Configurations moved to Channel

This Channel requires either a YouSee connection or a subscription.
Makes more sense to add it to the Channel and not to the system files.
Has begun API implementation, therefore there is a lot of unused code, but please do not remove it.
also, this might not merge nicely, since this i completely new rewrite, so if all fails, just scrap the old channel ;)
/Michael
PS. Thanks Sander for seeing my bug on last rejection ;)
Do not commit when hungover ;)