#44 Apple II Mode

[Cambragol]

This a basic set of graphics to convert xu to an 'apple' mode, including tiles, characters, the title page, frame and the beasties. All the graphics are referenced/setup through the graphics.xml. I have made additionally code changes to make the 'apple mode' more complete (all text messages/text formatting reflecting the apple II styles), however, that can wait for a second patch, as the graphics are the meat of the changes.

[Cambragol]

Here is an updated charset_apple.png which gets rid of the incorrectly colored bar on the top right of the main screen.