Re-factoring the graphical fonts

Hello developers,

currently we have a few drivers that support graphical displays. For these typically a font is needed. Right now the following drivers use utilize fonts:

* sed1520
* i2500vfd
* mdm166a
* t6963
* imonlcd

Unfortunately there is no common font file although the first three (sed1520, i2500vfd and mdm166a) use the same font. The t6963 and imonlcd share some font data as well although imonlcd organizes it differently.

I would like to re-factor the font for the first three and t6963 into a new common font file (with some extensions).

To get an impression of how the different fonts look like I set up a web page on my developer home: http://mmdolze.users.sourceforge.net/lcd_fonts.html

I appreciate your comments.

Regards,
Markus