Lots of rendering related changes, specifically for BackedQuad and IQuadTransformers.
Removed our deprecated model generators, modders should have been using vanilla's for a while.
Fixed wrong example path for the access transformer in the MDK build.gradle. #5891
Added getters for mouse x/y velocity and if the middle-mouse button is being held down. #5776
Modify issue template for better clarity. #5874
Fixed grindstone not using ItemStack-sensitive getMaxDamage. #5831
Added ParticleManager.registerFactory to Forge's AT. #5896
Fixed NPE in SidedInvWrapper when side was null. #5787
Moved EndermanEntity.setAttackTarget super call to allow LivingSetAttackTargetEvent the ability to override default behavior. #5778
Added field to make "Looking at" debug info maximum distance configurable #5714
