Add QMOD build, remove legacy BMBF build, fix script issues.

Changelog:

• Fixed some errors in various scripts.
• Added .QMOD build for BMBF or QuestPatcher. (the mod.json defaults to com.beatgames.beatsaber, however this could be easily changed to Gorilla Tag or something else).
• Removed legacy BMBF ZIP build, as BMBF now supports QMODs.