I rearranged the repo and standardized package names to org.corundummc.

I divided the code into its separate components -- Corundum, the Corundum
Hub (launcher), and the Corundum installer. I also renamed the packages as
discussed to reflect our future website's domain, "corundummc.org".

Signed-off-by: REALDrummer <conman.davey@gmail.com>