fixed wood, and cactus

Oak has branches to make it different, cactus has the right minecraft
ID.  Updated to boskee commit 54b182804773bb78ca58d63ebb6552bfb8d56ba1
fixed *branch_block error

I forgot to comment out the two unused branch blocks.  My bad.
code tweaks..see comments

added -newcfg to delete the old config, -nosound to keep it quiet.
tweaked the trees a bit also.
screenshot submitted
added windows downloads for pyglet
Cactus bug + some rewritings in blocks.py.
Merge branch 'master' of git://github.com/avelanarius/Minecraft
Fix DRAW_DISTANCE.
Random Ores generated

iron, coal, diamond and gold ores are generated with terrain.
New blocks include (in terrain.png, terrain.xcf and blocks.py)>
furnace, melon, farm dirt, cobblestone, stone slab and bookshelf. not in
use yet in the code, but they are avaliable for use.
fixed bookshelf, adjusted startup items
Fullscreen option

Press "Q" to quit, but only in fullscreen, also, minor startup inventory
tweak.
update README.MD with fullscreen
Merge commit 'd3c8d2ede5d2ac12ade017f9061b2316c0ffdf6b'
Merge commit 'c923970c771e1c5b421ee8797f08048458aac2b7'

Conflicts:
	README.md
	blocks.py
	main.py
	screenshot.jpg