Changed Metadata groupId -> recording, speakersIds -> people, respeakingId -> suffix.
Metadata now includes a 'source' field which contains the ID of the source recording
added a 'type' field to the metadata files.
Testing out use non-static methods of Beeper in RecordActivity.
Originals now have their Format, BitsPerSample and NumChannels written to JSON file.
Respeakings now add RIFF header data to the metadata file.
Added musicg lib and using it to read some info from imported WAV files.
correctly reading information from imported WAVE files. Closes #170