The Doxygen-to-pdf toolchain can not easily generate
pdf's with Japanese and Chinese characters. This patch
generates code blocks by rendering them in FLTK.
Regenerated src/fl_cmap.h with less spaces, updated copyright year.
Only whitespace and comments are changed in this file.
Note that src/cmap.cxx is not compiled to build the FLTK libs,
it's only used to generate src/fl_cmap.h.