* Replace DejaVu with Biolinium for the existign sans-styles.
* Add additional sans-styles using Biolinum.
* Update the GUI style definitions to use the sans-styles instead of
serif styles.
(Wait with updating custom defined fonts in strings, as it will cause a
mess with the internationalisation that's about to be included)
* Add fonts from the quite complete FreeFont family as fallback fonts.
* Render all glyphs supported by the different fonts to support as many
scripts as possible.
* Fixes#2457.
(Now hope I included all needed files)
This was SVN commit r14853.
