Make the Entry class extendable
Add a Category model
Start on some scope docs
Add push method to FieldCollection
Remove custom Builder class
Make EntryCollection instantiation a little easier
Add ChannelRepository and FieldRepository
Make sure repository queries are only called once
Add AbstractJoinableModel
Add setters for Entry's Repositories
Add a basic IoC container
Change README to use IoC container
Change all array-based scopes to variadic arguments
Add ExplodeHydrator and PipeHydrator
Fix relationship collection classes
Add Site model
Add SiteCollection
Add SiteRepository
Add SiteRepository to IoC
Move tagparams scope parameterMaps into method