The .h files must be edited to replace '#include "u8g.h"' with '#include <utility/u8g.h>', replace 'U8G_FONT_SECTION' with 'U8G_SECTION', insert '.progmem.' right behind the first '"' 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.