Added Swedish translation
Update languages/de-informal.yaml

Better publish_date,publish_time,user_accounts_security_check,404, few typos 
Merge pull request #21 from kroofy/master

Swedish translation added
Merge pull request #22 from lekkerding/patch-1

Cleaned typos, better expressions on few
Merge pull request #20 from ebeauchamps/master

A few changes to the French language pack