 Append uploaded data to master table.
 Append uploaded data to master table.

 At the moment, throws an exception if there is no master table.
 This needs fixing, once I figure out how.

camelot-project/frontend,e-koch/frontend,keflavich/frontend,e-koch/frontend,adamginsburg/frontend,keflavich/frontend,adamginsburg/frontend,camelot-project/frontend,e-koch/frontend,scog1234/frontend,scog1234/frontend,keflavich/frontend,adamginsburg/frontend,scog1234/frontend,camelot-project/frontend