PyMCL a0.6 Pre-3

Preview 3 of PyMCL a0.6.
WARNING: EXPECT CRASHES, BROKEN BEHAVIOUR AND OTHER UNEXPECTED STUFF.
This release is pretty stable though.

See changelog.md.

Known issues:

Buttons on OSX are still messed up. I doubt I can fix this.
Modpack exporter sometimes doesnt delete some sound files. This is because they are modified.
File size is double what its meant to be. Hopefully fixed next update.
The mini ram allocation setting box is set too far right.