Add better iOS example apps

[armadsen]

The current iOS example app, MIDI Soundboard, is badly out of date, and was never good to begin with. As MIKMIDI is probably used as much or more for iOS as it is for OS X, iOS example apps are important. To start with, an iOS app that is more or less like MIDI Files Testbed seems smart.

At a minimum, it should:

• Show MIDI files using a notes view similar to MIDI Files Testbed on OS X. This view should be scrollable, and possibly zoomable.
• Allow connecting to MIDI devices, e.g. through the camera connection kit and/or via Network or Bluetooth.
• Allow recording (using MIKMIDISequencer).
• Load MIDI files
• Allow playback of loaded MIDI files, or MIDI recorded by the user.

[armadsen]

@georgeyacoub has indicated interest in working on this.

[armadsen]

See #186, #183.

[armadsen]

Didn't mean to close.

[valnenov]

While trying testing the iOS example on iPhone 7 (target 11.2) I am running into the same runtime error: "2018-01-31 17:31:59.389570-0800 MIDI Soundboard[765:115699] +[CATransaction synchronize] called within transaction 2018-01-31 17:31:59.430226-0800 MIDI Soundboard[765:115699] Unknown class ORSViewController in Interface Builder file. "

Any suggestions on how to make this work?

Thanks, Val