Status:
(1) Supported versions: id3v2.3, id3v2.4
(2) Supported TAGs (reading): Text Info Tags, APIC, POPM, USLT, GEOB, MCDI, COMM, USER
(3) Supported TAGs (writing): artist, album, title, comments, genre, year, track no, jpeg-file
(4) Working flags: 'Unsynchronisation', 'Data length indicator'
(5) While writing APIC tag, image is resize to (640,960), to save space
(6) Writes binary data of TAGs (APIC, GEOB, MCDI) into files in local directory
(7) Issues:(a) Other TAgs/flags need to be implemented
           (b) While modifying a TAG, skips writing all similar TAGs into output file
               (Error, It should skip TAG with same 'Content type' only)
           (c) Always writes to out.mp3 file, even when just reading the TAGs