[Inkscape-translator] Icelandic translation

Hi, Just reported in the bugtracker my updated Icelandic translation, please integrate this into repo. This time all UI-elements and most of the tools have been translated (55% done). Bunch of corrections, many of those are "comment|string" thingies incorrectly done (stemming from *buntu). Done from POT as of 05/02/2015 Sveinn í Felli <https://bugs.launchpad.net/inkscape/+bug/1426423/+attachment/4341604/+fil...