fixed streaming mode in RhythmTransform to output Array2D; fixed an error in the implementation

Fixed an error that would output periodogram in the last band inteed of required sum of periodograms across all bands
cleaned code for archivemusic streaming extractor
Merge branch 'master' of https://github.com/MTG/essentia

Conflicts:
	src/examples/streaming_extractor_archivemusic.cpp
	src/examples/streaming_extractor_archivemusic_lowlevel.cpp
changed default value for 'inputSize' in ERBBands to the same value as for MelBands