Lightweight Java Game Library Code

OAL patches by Ciardhubh

AppletLoader: slightly more meaningful and friendly error message.

AppletLoader: Remove the boxerrorcolor parameter, there is not much advantage in having different color error message font, its better to have a nice consistent error message then to try scare the user. Also simplifies the AppletLoader api by reducing the number of parameters.

fix: Keyboard focus handling broken when using Display.setParent() applets on Ubunutu (strangly worked on OpenSuse), hopefully should be fixed now.

AppletLoader: fix issue with caching and lzma/pack200 files

Appletloader: fix caching issue with native jars

AppletLoader: fix code to compile on java 1.4

Appletloader: Initial implementation of a proper caching system. Files will only be downloaded if lastModified time is different from when files were downloaded previously. al_cache parameter is used to disable and enable this caching (default: true). This caching will not be used if al_version parameter is used.

AppletLoader: fixed flicker on animated gifs using ImageObserver. When image is ready to be drawn it is copied into a buffer image ready to be drawn. Also now supports variable time animated gifs and not limited to drawing only every 100ms.