added placeholders for js, css and html files

also added some imports to server.py for template handling.
First experiment with sessions
Merge remote-tracking branch 'origin/david/master' into arturo/master

Conflicts:
	server.py
Chat app skeletonJ
Correct routing syntax
Redis storage of messages
Passing messages to templates, and chatroom to send_message
integration of flask routes with frontend
Correct position of comment :)
Merge remote-tracking branch 'origin/david/master' into arturo/master
added submit button for enter submission
Merge branch 'david/master' of github.com:arturosevilla/notification-server-example into arturo/master
css and socketio listener

also added some eyecandy.
Merge remote-tracking branch 'origin/david/master' into arturo/master
Generation of secure Session ID and Config reading