Refactor sound generation and just include the player

[jorgegv]

Refactor sound generation and just include the player. Include sounds
in .gdata files, so that only used sounds are generated and included in
the final game

Idea: define a sound bank first, then assign sounds from the bank somewhere else

[jorgegv]

Most probably this can be handled by...removing it and instead using the z88dk provided sound libraries and sound banks

[jorgegv]

The beep_fx routine which was included (and ripped from La Churrera) has been included in stock Z88DK in the 1-bit sound library as bit_beepfx. The player is just 148 bytes, and I've had some trouble using the library directly, because tit was being located into contended memory.

So, as the fx definitions are compatible with the library ones, and those are already setup with #defines and labels, ready to be used from C, I have just kept the beeper.asm (which I can kick into high memory), adapted it to work with the same parameters as the library routine, and removed all sounds from the sound bank.

Sounds will come from the sound library if used.