ElunaOne

Use a single repository for the engine and keep the core specific changes in the core repositories.
Easier to make changes to the engine and keep the changes consistent with all emulators.

Now using submodule for Eluna.
See https://github.com/ElunaLuaEngine/Eluna/blob/master/docs/INSTALL.md

http://chrisjean.com/2009/04/20/git-submodules-adding-using-removing-and-updating/