Removed the 'kk' key-chord as it conflicts with very common words in the Danish language (and possibly other Scandinavian languages).

Danish words, such as 'ikke' (en: not), 'drikke' (en: to drink), and tons of danish names has two Ks after each other, such as "Frederikke", "Rikke", "Mikkel", etc.

The 'kk' key-chord makes text buffers, such as ERC nearly unusable. I have no good suggestion of what to replace it with; but I would really like to have it moved to another combination.