Alpha release

Now includes support for CGA, EGA, VGA and Hercules display modes. Note that in Hercules mode, the mouse cursor is currently not visible.

Several improvements to parsing and rendering. Images are now displayed as boxes with alt tag text.

Boot disk images include a minimal FreeDOS installation with an NE2000 packet driver. Can be used to test with PCem (set network address 0x300 with IRQ 3 for your emulated network interface)