I made the base of the PluginLoader and made the PluginThread plugin final.

If the implementation of PluginLoader could really be this simple, it would
be wonderful; however, I have a feeling this will not work. We'll see.

Signed-off-by: REALDrummer <conman.davey@gmail.com>
Merge branch 'master' of https://github.com/asusoda/Corundum