Merge change 376 into donut

* changes:
  Add support for changing a threads scheduler group. Three groups are available (default, background non interactive, foreground boost). Setting a thread priority to PRIORITY_BACKGROUND will transparently change groups to background
tree: 54b653d5f7084331e86ce50c72f5798450973c35
  1. awt/
  2. camera/
  3. cmds/
  4. im/
  5. include/
  6. libs/
  7. opengl/
  8. MODULE_LICENSE_APACHE2
  9. NOTICE