v2.1.0

Commits

• a96c436: change box type to fourCC, i.e. bytes, as defined in spec (#3) (ktp420) #3
• 493379b: update version to 2.1.0 (Ketan Patel)

v2.0.0

• updated to construct 2.10.70
• added support for mp4 metadata
• fixed many bugs