Metamorph

This is a small patch that fixes some mob morph behavior (all of these fixes and tweaks were made by IndeanaJones).

Compatible with McLib 2.0. It doesn't mean that future versions of McLib would be incompatible, but older versions are most likely incompatible.

• Added rotten, step_up abilities
• Added mob attack
• Added support for bigger explosions when charged creeper morph is acquired for explode action
• Fixed jumping ability not working during the rain
• Fixed and improved hostile mechanic
• Fixed morph attack actions being applied even through indirect player damage
• Improved iron golem morph
• Updated Chinese strings for 1.2 (thanks to Chunk7, KuenYo_ and H2SO4GepaoAX)