Shave a half-second off .WAV load time by parsing the data frames entirely within C (numpy) using `np.fromstring()`. More efficiency and wider format support could come with adopting `scipy.io.wavfile.read()`, but we need to introspect Pettersson metadata before parsing. (Fixes #9)
Shave a half-second off .WAV load time by parsing the data frames
entirely within C (numpy) using `np.fromstring()`. More efficiency and
wider format support could come with adopting `scipy.io.wavfile.read()`,
but we need to introspect Pettersson metadata before parsing. (Fixes #9)

riggsd/zcant,riggsd/zcant