Lightweight Java Game Library Code

Fix for OpenAL debug builds.
Added alternate methods for NV_fence.

yes, we really should...

use context classloader, since u19+u20 broke the old impl

Fixed ByteOrder of @Return ByteBuffers.
Cleaned up Drawable interface and introduced a reusable base implementation.
Added support for disabling runtime function checks, buffer checks and state tracking. Activated with -Dorg.lwjgl.util.NoChecks=true

Remove extra permissions from XRandR and just allow minimal permissions needed by the LinuxDisplay.

Added support for a new Drawable type (SharedDrawable) that shares its context with another Drawable.
Added new methods to the Drawable interface (makeCurrent, releaseContext, destroy).
Added a background thread texture loading test (using either Pbuffer or SharedDrawable).

minor tweak to XRandR class to add AccessControllers to remaining methods that need it.

2.4.2 release

fix: When using unsigned jars with signed lwjgl jars it fails when creating a Display on linux with an AccessController error. This is due to the new XRandR class missing a AccessController.doPriviledged method when it requires out of sandbox access. (LWJGL Applet Distribution is borken on linux without this fix)

prepare for 2.4.1