[elinks-dev] Merge with utf8

[Witold Filipczyk]

I did merge with utf8 branch.
If you notice any new bugs report them immediately.

There were conflicts in src/dialog/options.c (that was trivial I think),
src/document/html/renderer.c (I don't know what to do with that old code),
and src/document/plain/renderer.c (I replaced that file with utf8 version).
That conflict was too difficult for me to resolve right now.
Feel free to restore features which were lost or wait a few weeks,
maybe I will do it.

-- 
Witek