WAV option for appmake +cpc

[stefano]

I just extended appmake to optionally create a WAV file. The new option is based on the cpc2tape tool.
Programs can be run via the sequence:

|tape
run "

The speed can be improved by using the rate option, which affects the WAV resolution directly: I chose to keep it at 8000 samples per second by default but should work with a slightly faster rate too.

[stefano]

I forgot to say that there could be some endianess issue I couldn't check.. are there MACOS users out there which could verify that everything is fine ?

Build command to try:
zcc +cpc -subtype=wav -create-app world.c

The MESS emulator is enough to run it.