Dtas 0.7.0 - duct tape audio suite for *nix

Free Software command-line tools for audio playback, mastering, and
whatever else related to audio. dtas follows the worse-is-better
philosophy and acts as duct tape to combine existing command-line tools
for flexibility and ease-of-development. dtas is currently implemented
in Ruby (and some embedded shell), but may use other languages in the
future.

Changes:

minor feature and teeny optimizations

dtas-splitfx gained support --no-dither/-D option.

dtas-player should work now for non-Linux users without splice().
There are minor optimizations for users of multiple sinks with
dtas-player.