Lightweight Java Game Library Code

Moved Sys.JNI_VERSION to SysImplementation.getRequiredJNIVersion() to enable platform specific native library versions.

Mac OS X: Worked around another Display.destroy hang when parented to an applet

Mac OS X: Fixed a hang on Display.destroy in applets

Don't use reflection for AWTUtil.getPointerLocation

Windows: Improved error messages for nChoosePixelFormat

Windows: Fixed compile error

Windows: Added error handling to nCreateWindow

switch caching off globally instead of on a per connection bases.

NewStringNativeUnsigned should return NULL if argument string is NULL

Fix for caching problem, now ensures latest jars are downloaded when using the appletloader caching tag, also no longer fails on receiving incorrect content-type from server.