Dev snapshot build 0.4.dev-20120122-1

This is a larger changeset. See this wiki page for information.

Build for Windows:
https://github.com/downloads/celeron55/minetest/minetest-0.4.dev-20120122-1-win32.zip

Latest commit:
https://github.com/celeron55/minetest/commit/cb05a28745ae4f4f6ad6f4b922bc1b465c6287fa