Security notice/disclaimer in the app

[jbenet]

(talked about it in person)

we should have a disclaimer for orbit that right now it's not private at all yet. We dont want users to accidentally think it is.

It should be somewhere clearly noticeable, maybe:

• the login/username screen. (a short warning label underneath)
• the "home" screen before picking a channel (before you select a channel the large pane is empty)
• the channel interface (it could be somewhere around the message box

[jbenet]

the disclaimer could say something along the lines of:

• "Security notice: Orbit is an early alpha. It is not private yet and peers in the network may be able to read all your messages."
• "Warning: alpha software. Messaging is not private yet."