Adding ciphering functions in js
Importing crypto routines in js
Adding key and hash field on creation form
Commenting chat.js
Adding a class 'invisible' for visibility: hidden
Adding verification of hash server-side
Add hash and key input in templates
Style
Verification of hash and key local storage management in JS - client side
Working on UI for key management
Merge branch 'develop/security'

Conflicts:
	chat/events.py
	chat/static/chat/js/chat.js