Various unsorted OpenTTD Patches

03_midi_mode_patch: (Patch against SVN r2040)
Add FM (Frequency Modulation) MIDI Support.
Normally provides a much better MIDI Music Quality ingame.
See also [ 1169940 ] FM Midi (Better Midi Music Quality)
http://sourceforge.net/tracker/index.php?func=detail&aid=1169940&group_id=103924&atid=636367

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sdlmidi_v3.patch: (Patch against SVN r11909)
Working Implementation of SDL_Mixer support.
This addresses several problems with the Linux MIDI support:

- No external dependency needed anymore (Timidity)
- Problems with mixing fixed (On some soundcards you could only choose between sound or music, not both at the same time)
- Reported to be faster than old MIDI support

[NOT SUBMITTED]
[TESTED AND WORKING / USE AT YOUR OWN RISK!]
[KNOWN BUGS] Only works with SDL sound driver

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sdlmidi_v2.patch: (Patch against SVN r2702)
Working Implementation of SDL_Mixer support.
This addresses several problems with the Linux MIDI support:

- No external dependency needed (Timidity)
- Problems with mixing fixed (On some soundcards you could only choose between sound or music, not both at the same time)
- Reported to be faster than old MIDI support

[NOT SUBMITTED]
[TESTED AND WORKING / USE AT YOUR OWN RISK!]
[KNOWN BUGS] None