ByteBuffer: add missing order() methods
ByteBuffer: add missing order() methods

Avian's ByteBuffer implementation is actually fixed to big endian. So
let's throw an exception if the user tries to change that.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

dicej/avian,dicej/avian,ucdseniordesign/avian,lwahlmeier/avian,bgould/avian,minor-jason/avian,getlantern/avian,bigfatbrowncat/avian-pack.avian,dicej/avian,marcinolawski/avian,joshuawarner32/avian,getlantern/avian,lostdj/avian,dicej/avian,lwahlmeier/avian,bigfatbrowncat/avian-pack.avian,lwahlmeier/avian,marcinolawski/avian,lostdj/avian,getlantern/avian,minor-jason/avian,lostdj/avian,bigfatbrowncat/avian-pack.avian,joshuawarner32/avian,ucdseniordesign/avian,ucdseniordesign/avian,marcinolawski/avian,minor-jason/avian,ucdseniordesign/avian,bgould/avian,minor-jason/avian,MaartenR/avian,joshuawarner32/avian,bgould/avian,MaartenR/avian,bigfatbrowncat/avian-pack.avian,MaartenR/avian,marcinolawski/avian,joshuawarner32/avian,bgould/avian,lostdj/avian,getlantern/avian,lwahlmeier/avian,MaartenR/avian