Release 0.9.4

** HF1 : fix for extended midi message that played with the pitchbend

• Standalone application version of Dexed
• Midi learn support for midi CC messages
• More accurate detune for operators
• More accurate EG envelopes. thanks @jeremybernstein
• Pitchbend now listen to any channels
• Fixed 'clicking' in mono mode
• Fixed implementation for Midi CC 0x78 and 0x7B (All Sound Off / All Notes Off)
• Windows/macOS installers