Many new unfinished modules

A few slight tweaks to existing code:  ITDLocalizer and SpectrumViewer
still work as before.

New modules include an object handler to queue metadata about new
acoustic events and provide a way to select between different "auditory
objects".  ITDObjectLocalizer and ITDSalienceLocalizer and
DetectFrequencyTransients should detect new events (time boundaries) in
the auditory scene and register them as new objects…this is work in
progress.