Musicbee overhaul, bugfixes, new features

Sorry for such a long break, but here we are, the long awaited 1.6.0 release of MDRP! Let's review whats new:

• New Musicbee integration! MB now requires a different plugin that I made. This will bring a time remaining count only for musicbee (see #46 for an explanation)
• Customizable artist and title tags, perfect if you would like them to be in a different language, or if you think they just get in the way, see the DiscordPresenceConfig.ini to change that
• The artist and title length have been increased, so this should reduce getting cut off unnecessarily.
• A lot of behind the scenes changes should reduce resource consumption, and for those that would like to make changes to the code, should now be able to.
• We ditched the groovyrp name, this should have been done earlier, but better late than never.

I fully expect at least 5 new issues in the next week between this and the plugin, so please dont be shy if you are having problems, as there are likely many people with the same problems.