[Work in progress] Serbian Freeciv translation

Download: http://goranrakic.com/tmp/freeciv-sr.zip

Translations stats as of 2011-10-26: about 33% of messages translated and 15% more marked as fuzzy, making only for about 11% of all text as help and longer messages are mostly not translated.

Committed as http://gna.org/patch/?3233 by Jacob Nevis.

My blog: http://blog.goranrakic.com