Set version number to 1.4 (dev)
seq_port -> synth_port as that is what it is; adjust ALSA names

* Set ALSA client name to "Midiedit" rather than "Controller".
* Also set port name to "Midiedit synth port".
Specify port in midi_foo calls, where applicable

* In preparation for using two MIDI ports, one for synth and one for
  controller (e.g. Nocturn).
MIDI handler now opens two ports

* One for the synth, one for a controller.
* midi_connect() can now saves remote device name per port.
Added control change receivers to MIDI subsystem