It is all develop from now on, we no longer make stable releases.
This means no maintenance of version numbers and removal
of all the overhead associated with making stable releases.
MultiMC 6 might have a better system, but with how infrequent and stable
MultiMC releases are getting, there's no need to have a distinction
between `stable` and `develop` anymore.
This allows shortcuts to be created on Macs (which don't have a concept of desktop shortcuts) as well as Linux systems that don't support the desktop file specification. Also included a windows batch file implementation.