[fpc-pascal] playing sound files (linux and windows)

[Marco van de Voort]

In our previous episode, Henry Vermaak said:
> 
> > I think for getting a simple playSoundFile() API to FPC/LCL on all
> > platforms, dependencies to 3rd-party libs can be avoided.
> 
> If you want you program to be a good desktop citizen, you should talk
> directly to the sound daemon (pulse on gnome, phonon on kde?).

The fact that they are different is the main problem there.