Add support for MAD* files (MADH/MADfg/MADI/MADK)

[mlindner]

These were created by PlayerPro and the associated MADLibrary.

https://sourceforge.net/projects/playerpro/ for more info.

[mlindner]

3000.madh.gz

Specifically I'm looking for support for MADH files which are older and date from the late 90s.

Here's this file converted into S3M format which libmodplug supports:

3000.s3m.gz

[bauxite69]

PlayerPRO.zip

I managed to build "ppplay.exe" (x64) from https://github.com/MaddTheSane/PlayerPRO

You can play .madf .madg .madh .madi and .madk

Source included and a solution for Visual Studio