[Adonthell-general] Double screen mode available

[Alexandre Courbot]

Hi guys,

I've added the double screen option to Waste's Edge. You now have a new
parameter in your config file (don't forget to delete it before
anything), that will default to 1, to set the video mode to 640x480.
Along with the rid of hard-coded data directory and Kai's bugfixes, this
will make a more suitable binary for you to play with Monday! :)

The technique used for doubling the res is quite simple: Every image
gets zoomed twice at load time, and when drawing stuff coordinates are
multiplied by two too. It's twice as big, and four times as slow ;)
Hardware acceleration will really be welcome when making large
translucencies.

I had to mess a bit the surface API, which has become a bit messy, but
as it won't make it out of 0.3, that's not serious.

Enjoy!
Alex.
-- 
http://www.gnurou.org