Add Mic Cue OSC methods

[jwetzell]

Check and ensure that Mic Cue OSC methods found here are implemented. This will be in a new class that extends QCue.

[jwetzell]

• [x] /cue/{cue_number}/channelOffset
• [x] /cue/{cue_number}/channels {number}
• [x] /cue/{cue_number}/setDefaultLevels
• [x] /cue/{cue_number}/setSilentLevels