Add the original configfile source files, rewritten to match the
coding-stye, and stripped from useless stuff (opengl, fullscreen, sound,
music).
Add the original lispreader source files.
Make the current codebase compilable.
Fix header includes (Try to put as much as possible #include statements
in headers).
Remove useless stuff (joystick, cursor mouse support, seticon ...)
Add scene source files to provide scroll_x.
Fix a few indentation stuff.
Comment some function in setup.cpp and the keymap support, to make the
current codebase compilable. (These functions and the keymap support
will be restored in next commits)
Add a wrapper for SDL_GetTicks to return an unsigned int, and to be
compatible with function pointers.