Change how blocks/items are registered (desc)

tterrag is a meany face and yelled at me for using class.getSimpleName(). So here's an API-friendly re-work of the registration system. This allows all our Items/Blocks to be obtained via the API. Just add a new enum.

src/main/java/WayofTime/bloodmagic/item/ItemActivationCrystal.java

@@ -20,6 +20,7 @@ public class ItemActivationCrystal extends ItemBindable
         super();
 
         setUnlocalizedName(Constants.Mod.MODID + ".activationCrystal.");
+        setRegistryName(Constants.BloodMagicItem.ACTIVATION_CRYSTAL.getRegName());
         setHasSubtypes(true);
         setLPUsed(100);
     }