Add OPL research data to version control.

Subversion-branch: /research
Subversion-revision: 1480
Add trace files for examining menu volume values.

Subversion-branch: /research
Subversion-revision: 1481
Remove adlib.txt.

Subversion-branch: /research
Subversion-revision: 1482
Clear all registers before starting to play.

Subversion-branch: /research
Subversion-revision: 1483
Add doom2 OPL trace.

Subversion-branch: /research
Subversion-revision: 1484
Add DOSBox raw capture of deca.wad demos.

Subversion-branch: /research
Subversion-revision: 1485
Add OPL volume level research data.

Subversion-branch: /research
Subversion-revision: 1486
Add GothicDM DOSbox raw OPL capture file.

Subversion-branch: /research
Subversion-revision: 1493
Fix playback of OPL2 samples with an OPL3 chip.

Subversion-branch: /research
Subversion-revision: 1496
Add OPL traces from Heretic and Hexen, plus some other games.

Subversion-branch: /research
Subversion-revision: 1497
Add research data for tag 666/boss death investigations.

Subversion-branch: /research
Subversion-revision: 1530
Research data into how Doom behaves when it runs out of voices.

Subversion-branch: /research
Subversion-revision: 1655
Add pitch bend research data.

Subversion-branch: /research
Subversion-revision: 1656
Fine tuning field research.

Subversion-branch: /research
Subversion-revision: 1663
Add most recent novoices findings.

Subversion-branch: /research
Subversion-revision: 1666
Findings from instrument priority investigation.

Subversion-branch: /research
Subversion-revision: 1667
Add patch list for Doom 1, and make dumper script take a filename
argument.

Subversion-branch: /research
Subversion-revision: 1669
Add instrument 36 scale data.

Subversion-branch: /research
Subversion-revision: 1674
Oops.

Subversion-branch: /research
Subversion-revision: 1676
Octave offset research data.

Subversion-branch: /research
Subversion-revision: 1677