started work on #2082
Merge branch '0.5.1' into csrf-excision
latest translations and fallbacks

Conflicts:
	public/language/de/user.json
	public/language/nl/user.json
	public/language/pl/user.json
	public/language/sv/user.json
	public/language/vi/user.json
	public/language/zh_CN/user.json
Merge branch '0.5.1' into csrf-excision
fixed all POST routes to use new csrf middleware
Merge branch 'csrf-excision' into hashtalk
Merge branch 'hashtalk' of github.com:NodeBB/NodeBB into hashtalk