New Block registry + Crash Fix

This changes how blocks are loaded.  They are now loaded and created in core - yes that removes the modular part) but theres a good reason, if you have a world loaded with blocks/items with the feature enabled, then just disable the feature, all the blocks will disappear.  With this, they wont disappear, but instead you can initialize crafting recipes etc in a feature.

~There was a slight bug in ItemPartOre which caused a crash when the Search tab in the creative invintory is pressed - I commented it out for the time being.