Fix possible crash with grass ABM.
Implemented facedir in the nyan cat rainbow
Revert dig time in creative mode to 0.5

This made it impossible to punch things without breaking them in creative
Fix tree growing and jungle sapling growth rate
Add 6d facedir to logs.
Allow cactus to lay on its side also.
Rewrite player.lua
Fix indentation, use log() instead of print() and use get_item_group() in tree growing ABM
Remove / replace all print() calls