Rough translation to danish

Added a da.xml file with rough translation to danish.
Deleted duplicate key entry from line 308

The keys in line 307 and 308 were identical - So deleted the one on line 308.
Removed line 307 since it was identically to 306

The "changePrices" key was duplicated in line 307, which I deleted.
Merge pull request #665 from BatJan/patch-2

Removed line 307 since it was identically to 306
Merge pull request #664 from BatJan/patch-1

Deleted duplicate key entry from line 308
Rough translation part 2

Translated more keys.
Merge pull request #667 from BatJan/1.2.0-localization-da

1.2.0 localization da
Merge branch '1.2.0' of https://github.com/rustyswayne/Merchello into 1.2.0