hookup_manager stage one:  New tables for pending and active hookups (pair programming events)

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. 
Thanks for pointing this out.
I think that I fixed the problem just now.  I pulled the latest develop branch, rebased this branch (hookup_tables), then did a push --force of this branch.
The file list is clean now.