Lightweight Java Game Library Code

made Display priveledged action private. Fixes a possible security exploit that would allow anyone to get a boolean from System properties *gasp*

Fixed KeyboardTest

Reverted the widening of Keyboard.getEventCharacter

Linux: Fixed Display.setIcon memory leak.

Windows: replace loadLibrary("jawt") with Toolkit.getDefaultToolkit() which is better and avoids classloader issues with multiple loaded natives. Additionally, getDefaultToolkit is not a privileged action, while loadLibrary is.

Windows: Added missing doPrivileged around loadLibrary("jawt")

Mac OS X: Made KeyboardEventQueue handle widened char types

Windows: Generalize getMin/MaxCursorSize to one native GetSystemMetrics

Windows: Moved is_dirty from native to java

Widened Keyboard.getEventCharacter() return type from char to int to accomodate 32 bit characters.