A start on authentication improvements

 * Stores the buddy fingerprint and compares it after re-ake

 * Quite a bit of cleanup
Add a hook for updating auth

 * Patched version of otr.js
 * FIXME for abstracting warning injection
Merge pull request #594 from arlolra/auth

A start on authentication improvements
Semi-functional auth status icons
utip styling tweaks
Remove redundant code
Shorten line
Did you use google translate for this?

For example, keyboard was translated to "klavier", which is the keyboard of a piano.
It's "de".
Merge pull request #595 from DGO143/patch-1

Did you use google translate for this?
multiParty.sendPublicKey just returns the message to send, replace by xmpp.sendPublicKey which actually sends it.
Merge pull request #596 from caedesvvv/master

Fix wrong usage of multiParty.sendPublicKey by xmpp.sendPublicKey.
Big steps towards new auth UI
Travis
Prevent opening for signed out nicknames
Fix syntax bug
Tutorial slideshow code (slides forthcoming)
Refactoring
Change text
Error dialog box added for re-AKE

cc. @arlolra