function isConflict(origStat, stat)
{
	return stat != null && origStat != null && stat.mtimeMs != origStat.mtimeMs;
}
File format used by digital cameras to store images.
Exif Format can be read by any application supporting
JPEG. Exif Spec can be found at:
http://www.pima.net/standards/it10/PIMA15740/Exif_2-1.PDF