nifty-renderer-jogl2: Rename AwtToNiftyKeyCodeConverter.java -> NEWTToNiftyKeyCodeConverter.java

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>
NEWTToNiftyKeyCodeConverter: Switch AWT -> NEWT KeyEvent

This change enable use of NEWTToNiftyKeyCodeConverter
on Android and similar systems where AWT is not available.

NEWT API do not distinguish left or right location for control keys.
NEWT is UTF-16 aligned, add a TODO for Japanese control keys.

JoglInputSystem: Switch AwtToNiftyKeyCodeConverter -> NEWTToNiftyKeyCodeConverter

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>