Update and rename ma_AR.lang to ar_SA.lang

Following http://minecraft.gamepedia.com/Language#cite_note-2 , the correct would be ar_SA, and this, apart from a few lines, is Spanish, not to sure if this translation is good to merge.
Also some lines have some " in front of them...
Delete dk_DK.lang

da_DK is correct, and the translations are the same
Merge pull request #129 from TheVikingWarrior/patch-11

New translation