Fixed issue with invalid UDTA (user data) atom crashing QuickTime X

Header is now back at beginning of file for fast start. The issue was that I was using '@swr' instead of '©swr', etc. and QuickTime X is picky or fragile.

LOAD atom now included too. Also, a WIDE atom is now included before UDTAin addition to MDAT.

Example movies re-exported.

Signed-off-by: horchler <adh9@case.edu>