adding ability to draw strings on bitmaps

[pcpratts]

hello. you can take the changes from here to add the ability to draw strings on bitmaps. My previous changes are still in there so you may not be able to do a pull. But this code gives the general idea. I used Java and their Graphics2D class to generate the pixel data for each character for the fonts.

[tarik02]

It would be good to be able to load bitmaps from memory.