Adds an average FPS.
Merge branch 'master' of git://github.com/ronmurphy/Minecraft
Reapplied Jimx's terrain.py changes after ronmurphy's merge
Source of changes: b6419df13b13ff8c4b3c97aa7b5e7b6923e2e42b
Source of deletion: 1430eb58d0ce030ecf25c114ad9a4bfcb30db377
Re: #64
Players walking through water/plants are now slowed
Players can now break blocks through water/lava
Updates world.pxd.
random blocks in water (sand, clay, gravel)