hookup_tables

relates to pivotal stories "display list of pending events in a table", 75025008, and "display list of active/live hookups (i.e. hookups with live hangouts) in a separate table",75025492. 
Nice.  I'm actually going to remove this method altogether since nothing uses it yet.  Same with adjust_dates_times.  These may be useful when we make a new scrums page (or modify the existing events/index page, but no need for them in this PR.