Days Gone By

Massive refactoring of renders and logic (had too much fun theorycrafting interfaces and abstract classes without really committing to it...), some bug fixing, and more polishing. Content will be added in the next patch; I just needed to do some housekeeping, then I can switch to MIT with public git and provide a guide.

There might be a few bugs I haven't test so please let me know if you experience them.

Initial release B)