[LMP FA] Configurator stubs.
[LMP FA] EqBandWidget stubs.
[LMP FA] Added BandInfo.
[LMP FA] EqBandWidget takes BandInfo now.
[LMP FA] Instantiate and pass bands to the configurator.
[Util] Moved prelude from PY here.
[Util] Prefer result_of in ZipWith().
[Util] Added Zip() to prelude.