specs: fix missing bracket in 3D extreme joystick description
classes: HIDExplorer, implement start/stop, and HIDMKtl explore
specs: specs for Impact gamepad, microKEY, nanoKEY2, NumarkOrbit and the ShanWan wireless gamepad.
explorers: add device info to MIDIExplorer document, and unify method names for HIDMKtl and MIDIMKtl.
Merge branch 'master' of github.com:ModalityTeam/Modality-toolkit

Conflicts:
	Modality/Classes/MIDI/MIDIExplorer.sc
	Modality/MKtlSpecs/Extreme3DJoystick.desc.scd