trees gen in mini forests now

also changed the amount of trees per map, to allow for survival (when it
is implemented)
Added Kytten import (GUI library for Pyglet) for future GUI stuff.

See https://github.com/kitanata/Kytten
Merge branch 'master' of git://github.com/ronmurphy/Minecraft
Enable texture transparency. Needs further improvements (drawing order) to make sure DEPTH_TEST is correct
Merge branch 'master' of git://github.com/BertrandBordage/Minecraft
TODO addition
Merge https://github.com/boskee/Minecraft

Conflicts:
	blocks.py
Verifies blocks using minecraftwiki + small fixes.