Jhbate/utc storage date

@kentquirk this is the basic implementation that only exposes what we use at the moment (ha ha) being getting an utc - iso timestamp as we require for messages and also function to display using the current format as used in TP apps blip and notes.

Also setup to use moment instance available from window if being used in web-app or require if being used server side or build using a process such as used with clamshell.