removed normalization from logfsgram
resolves #51
intified some indicies
accelerated stft
more stft acceleration
linted, commented
factored out frame function
fixed an outdated docstring
accelerated ifgram
inted onset indices
intified mel parameters
inted test script
inted indices
hacking around deprecation warnings
guh? stupid deprecation warning
added times_csv, annotation output
added formatting options to times_csv
updated docstrings for times_csv
added output.annotations, resolves #45
removed mutable parameters, resolves #56