SDL: add input support, use SDL mainloop in a thread
Add abstract class gMainDC as an interface for gFBDC and gSDLDC
- default fonts handled in windowstyle - fixed 32bit ARGB support (drawLine) - add sdl (but currently disabled) - fixed /dev/vc/0 -> /dev/stdin for console input - added alignment to label - fixed skin parsing (getElementsByTagName didn't do what i expected)