Switched to LWJGL 2.9.0 and Java 7.
Some refactoring.
Removed DroppedItemRenderer, changed dropped items to render through standard mesh renderer.
Fixed picking up dropped items.
Improvements to path management
 - Now splits out home directory (for saved data and mods) and install directory
 - Home defaults to being in an appropriate user home directory
 - Now using JNA to discover the Saved Games directory under Windows Vista, 7 & 8, to use as the default home directory.
 - Added commandline options -homeDir= and -homeDir to specify the home directory or use the working directory respectively.
This allows running multiple copies with different home directories for improved local testing of multiplayer.