Added dutch translations
Merge remote-tracking branch 'upstream/master'

Conflicts:
	conf/app.ini
updated translations with the latest master version
updated some strange translated message so they will match their context on the website
Merge pull request #527 from michaelboke/master

Dutch translations
Translate missing strings and some improvements
Add German translation to home page
Fix memecache/memcache typo
Merge pull request #529 from chk1/master

Translate missing entries & add German translation to homepage
Basic xss prevention