[LAD] Building fastbreeder, was "function generators"

[Gordon JC Pearce]

Since the last release of fastbreeder is now about four years old it
won't compile out of the box.  To get it to compile *at all* you need to
add:

#include <cstdlib>

somewhere at the top of Synth.cpp.  I could spend more time getting it
to compile cleanly, but like that it works.

Gordon MM0YEQ