Sensomusic updates Usine to v3.68d

Sensomusic has updated Usine to v3.68d

Fixed bugs:

• In the demo folder the mdspFlanger plugin is invalid.
• Error in the sequencer MIDI module.
• The Wii nunchunk doesn't work properly.

Other

• Lighter demo zip package.
• The Jazz Mutant Lemur demo is now available as an add-on.