BandLimitedWave: provide wavetables as pre-generated "bin" files, these will be installed under datadir/wavetables
The runtime-generation is still there as a fallback, and the file generation code is left in as commented-out, because
it might be needed in the future
Merge pull request #645 from diizy/master

BandLimitedWave: provide wavetables as pre-generated "bin" files, these ...