LTS & Repo options

I've added 2 optional parameters to the module.

lts (default 0) sets the repo to use LTS.  It won't auto specify the right modules, however.  

repo=0  disables the repo class entirely, to allow the user to manage the repo on their own.  Necessary for enterprise / limited access shops.

No good option for plugin LTS support or offline specification of plugin repo.   Some of this would be best discussed  & dealt with upstream.  They don't have the permalinks for LTS plugins :(