More API changes, the api package now no classes other than APIUtils.

Every interaction with Refined Relocation is now made using the APIUtils class. This will create the flexibility for us to be able to change some classes without breaking the API.
Merge branch 'origin/master'

Conflicts:
	java/com/dynious/refinedrelocation/mods/BarrelSortingInventoryHandler.java
	java/com/dynious/refinedrelocation/sorting/SortingInventoryHandler.java