Changed translation of taint (was "pollution", now more like "disease" or "contagion"; there is no good exact word-for-word translation).
Changed titles/names to match Swedish style of not starting most words in a title with a capital letter. Also got rid of incorrect
separation of compund words ("särskrivning").
The translation is done all the way down to staff core names.
Fixed inconsistency in "primal" translation
Merge pull request #1101 from tageborg/master

Translated further down in the file, improved translation of "taint" and fixed grammatical errors