Added refid values to output data to include in table.
minor changes to style assigned dates
minor format change
Removed a number of now-defunt / unused functions to clean up the library.

Added new functions to remove individual hosts given the reservation id (refid).
Added new columns for iftar coordinators and volunteers to support signup
for those roles.
Included new javascript for hover on date functionality.
Javascript to support hover on date functionality -- still in progress.
Driver to test/execute deletions of individual hosts given their refids.
Server-side file to return hosts to support hover-on-date functionality.