Better day/night cycle (2).
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).
Merge branch 'master' of git://github.com/avelanarius/Minecraft