* fixed bug of possibly calling onPostPlayback twice and on new episode when starting a new
* added flac comment parser, and improved ogg comment parser
* added extracting track number (if available) from Mp3, ogg and flac files
* added sorting episodes by track number
* in PlayerUI
	* added mime type text
	* text "Stereo/Mono" is replaced with channel count: 1: Mono, 2: Stereo, 6: 5.1, 8: 7.1
	* added sample rate in KHz
	* bitrate is shown only when available
