src/gui/a4f.c: Add module to handle fonts.
src/gui/utils.c: Add base global fonts, useable for all parts of the GUI.
pkgdatadir/Makefile.am: Also install FreeSans.otf file.
src/cmdline.c: Fix bug in --bindir handling.

  Specifically, --bindir was assigning to the pkgdatadir.
pkgdatadir/Makefile.am: Also distribute lexicons file.