0.0.1 - orig program, flat maps
0.0.2 - fixed buggy plotting code
        lines overlapped properly now
0.0.3 - added Z-axis handling
0.0.4 - added command-line control of options
0.0.5 - added direction of fake-Z offsetting
0.0.6 - added camera axis, added auto-Z-offset selection
0.0.7 - started implementing extraneous line removal
0.0.8 - option to negate the picture
0.0.9 - name now bsp2bmp, as it writes an (uncompressed) BMP file
0.0.10 - bugfixes in BMP writing
0.0.11 - add option for small polygon removal and small line removal,
         more BMP writing bigfixes (but still doesn't seem right).
0.0.12 - fixed a big bug introduced in last version's BMP writing code.
         however is still not perfect.
qf cvs - (Bill Currie) bring into QF using quakeio functions, creating an
         image_t type for the line point drawing, ditching the raw and bmp
         formats in favor of pcx (for now), and renaming to bsp2img. I'll be
         working on getopt, bspfile and other image formats in the future as
         well as generally cleaning up the code.