Revision 3687

EngineChannel: Overhaul of RPN / NRPN related methods:

* Added new *Rpn*Parameter*() methods as replacement for previous
  *Rpn*Controller*() methods and marked the old ones as deprecated.

* Added new *Nrpn*Parameter*() methods as replacement for previous
  *Nrpn*Controller*() methods and marked the old ones as deprecated.

* The new GetMidiRpnParameter() and GetMidiNrpnParameter() methods
  return their result as common (in MIDI world) 14 bit representation
  of sender's MSB and LSB values, instead of the uncommon 16 bit
  representation of the old GetMidiRpnController() and
  GetMidiNrpnController() methods.

* Bumped version (2.1.1.svn28).