Implement FontFace

[silkeh]

As seen here, it might be useful to set all the font faces in the font definition. For example:

  FontFace={el}{n}{*-ExtraLight},
  FontFace={el}{i}{*-ExtraLightIt},
  FontFace={l}{n}{*-Light},
  FontFace={l}{i}{*-LightIt},
  FontFace={sb}{n}{*-Semibold},
  FontFace={sb}{i}{*-SemiboldIt},
  FontFace={el}{n}{*-Black},
  FontFace={el}{i}{*-BlackIt},

The shapes should probably match the Type1 fonts.