* Changed MidiDriver::createMidi so that if MD_ADLIB is passed, it
now *does* instantiate the adlib driver.
* Rewrote MidiDriver::detectMusicDriver (code should be clearer now,
and hopefully easier to adapt/maintain). Note that the behavior
changed slightly (this may require some tweaking).
* Added MidiDriver::findMusicDriver which works similar to the old
MidiDriver::parseMusicDriver but returns the full MidiDriverDescription
and ignores all characters in the passed driver name following a colon ":".
* Changed MidiDriver::parseMusicDriver to use MidiDriver::findMusicDriver.
* Changed game engines to match the changes made to MidiDriver.
* Modified SCUMM engine to not record the selected midi/music driver
(in _midiDriver), but rather the music *type* (in _musicType).
svn-id: r19859
60fcd5a171