bba: Fix config defines
pthread: Update initializers to fix pthread's rwlock
rwsem: Use semaphore instead of mutex for read lock
Bumping KOS version on master branch to 2.3.0.
Per change request, add exit condition to the example.
Per pull request suggestion, add duration to sprite blits.
Add an oddball-sized image to better show that the texture-handling works for all image sizes.
Per pull request suggestion, ignore . and .. directory walk entries.