Update Devise to 2.1.3

http://blog.plataformatec.com.br/2013/01/security-announcement-devise-v2-2-3-v2-1-3-v2-0-5-and-v1-5-3-released/
Merge branch 'hotfix/0.0.2.3'
Fix XSS vulnerabilities caused by not escaping a users name fields when loading it from JSON. #3948

From a quick look at the for us available databases this was not actually used in the wild.
Merge branch 'hotfix/0.0.2.4'
merge master
Merge branch 'despora' of github.com:prellele/diaspora into despora