Updated Pubnub version

Need newest version for the here_now function for easy presence
detection. Switched up the setter for the text area to use value because
it didn't seem like innerHTML was updating the page very well.
Added player concept.

Players can only update their text areas and not the others. Other text
area is set to readonly, and if someone does mess with that the system
only updates the sending parties text area
History populates fields.

The previous command shows up in the text area. So that when p2 joins
when p1 joins, p2 gets whatever p1 has entered into the textarea.

Note that this doesn't current scale past two players being on the site
at one time.
Merge branch 'master' of github.com:EJEHardenberg/coop-code

pulling again
added a sweet gradient and shit