Implement a kind of font mapper which takes a list of font files, font
face name, size, slant and weight and finds the best matching face.
Fakes italic and bold if there it isn't available.
This commit adds support for TTC files which contains multiple faces
(used by CJK Windows fonts).
This allows clients to use the default FreeType2 render mode instead of light.
We really only use light as default because that's what looks best with the
font we use in our GUI right now (which is the same reason why formerly light
was always used in non-monochrome mode).
The charsets used by the translations now need to have a "$(name).cp" file,
which contains an charset index => unicode mapping. Otherwise
create_translations will fail.
Eugene Sandulenko
Paweł Kołodziejski
Le Philousophe
Cameron Cawley
Bastien Bouclet
Johannes Schickel
Alyssa Milburn