Add string print

[theorywrong]

I have add some function for write string and change the background

[psxdev]

Hello, glad to see people using it. I need to commit some changes first including audio library compliant with psp and vita already availables, and i would like separate pure draw stuff from font stuff (manage different fonts, unicode, etc). We have not yet a gnm replacement and we need to work on that

[theorywrong]

Have you any place for talk or exchange search and for some help in programming ?

[masterzorag]

I think you should made use of FONT_WIDTH (for off) and FONT_HEIGHT defined in font.h in this function (actually does not have an use), to let us change the font definition without issue