Updated to use code from forks. REOL-28
Implemented covers using hook instead of provider. REOL-28
Changed signature of getLibraryUserOrderList. Changed to pass retailer_id to call, instead of having to get the library in every call. REOL-32
Use loans class. Return all. REOL-32
Added/removed properties to support our needs. REOL-32
Allow only sending one isbn as well. REOL-32
Added helper function for getting the retailer id for a user. REOL-32
Removed reference to removed class. REOL-32
First implementation of getting loans. Needs some work. REOL-32