* Boss bar mappings
* Tons of GUI related mappings + reorganization
* Move GUI classes out of gui.screen
* Move classes out of old hud.impl package
* Reorganize GUI packages (number 2)
* Food related mappings, Entity related mappings, smelting related mappings.
* Change item creative tab mapping to match blocks, small change in the smeltingregistry.
* SmeltingRegistry areEqual -> matches
* remove sendTextNotification as it has more uses.