Add initial hangout button code
lf - update todos
[MRH] Move script line to header

* The basic button now works.
* Also remove debugging text from hangout_button template.
[MRH] Add hangouts doc link to Links section
lf - only hangout if user in room
Merge branch 'mrh_hangout_button'

Conflicts:
	README.md
Merge branch 'master' of github.com:lfender6445/kokomo

Conflicts:
	README.md
	client/views/application.jade