v101 Update

Thanks to some feedback ( thank you! ) I've added a couple of small changes and tweaks:

• Added an alternate control scheme: WASD moves, and the arrow keys perform actions. Use SHIFT to switch. Use CTRL to toggle control scheme display.
• Fixed some inconsistencies in collision detection against entities (bushes, mobs, etc.)
• Adjusted decay times on a few things so they go away or stay around at times that feel a little more reasonable (particles, drops, etc.)