Added font tools

Marlin/scripts/Fonts/README.fonts

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+The fonts are created with Fony.exe (http://hukka.ncn.fi/?fony) because Fontforge didn't do what I want (probably lack off experience). 
+In Fony export the fonts to bdf-format. Maybe another one can edit them with Fontforge.
+Then run make_fonts.bat what calls bdf2u8g.exe with the needed parameters to produce the .h files.
+The .h files must be edited to replace '#include "u8g.h"' with '#include <utility/u8g.h>' and moved to the main directory.
+
+Especially the Kana and Cyrillic fonts should be revised by someone who knows what he/she does. I am only a west-European with very little knowledge about this scripts.

Marlin/scripts/Fonts/make_fonts.bat

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+.\bdf2u8g.exe -b 1 -e 9 Marlin_symbols.bdf Marlin_symbols dogm_font_data_Marlin_symbols.h
+.\bdf2u8g.exe -b 16 -e 255 HD44780_W.bdf HD44780_W_5x7 dogm_font_data_HD44780_W.h
+.\bdf2u8g.exe -b 32 -e 255 HD44780_C.bdf HD44780_C_5x7 dogm_font_data_HD44780_C.h
+.\bdf2u8g.exe -b 32 -e 255 HD44780_J.bdf HD44780_J_5x7 dogm_font_data_HD44780_J.h
+.\bdf2u8g.exe -b 32 -e 255 ISO10646_5_Cyrillic.bdf ISO10646_5_Cyrillic_5x7 dogm_font_data_ISO10646_5_Cyrillic.h
+.\bdf2u8g.exe -b 32 -e 255 ISO10646_Kana.bdf ISO10646_Kana_5x7 dogm_font_data_ISO10646_Kana.h