Fix Python 3 compatibility.
Merge branch 'master' of git://github.com/avelanarius/Minecraft
Added inventory GUI :D

Added inventory GUI. You can show it by using 'I' key. It currently only shows inventory, without allowing user to change items in it. Some inital items are added to inventory.
Light system update.
Added ability to scroll in inventory (when inventory GUI is visible).
TREES (could be better)

-maxtrees #, also, trees in -terrain built in.  Bad tree looks for
generation, feel free to adjust and share.
Merge branch 'master' of git://github.com/avelanarius/Minecraft
Added function to move items from inventory to quick slots and from quick slots to inventory. You can do this by using Enter key.
Merge branch 'master' of git://github.com/ronmurphy/Minecraft
Removed redundant GLOBAL
Merge branch 'master' of git://github.com/avelanarius/Minecraft
Change inventory key to E as per Minecraft.
Bug fixes.
Merge commit '88b79ba165dc166de695055cab908bfca68e8632'

Conflicts:
	inventory.py
trees gen in mini forests now

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

See https://github.com/kitanata/Kytten
Rewrites blocks into more pythonic classes.
Merge branch 'master' of git://github.com/ronmurphy/Minecraft
Enable texture transparency. Needs further improvements (drawing order) to make sure DEPTH_TEST is correct