From the Google JavaScript Style Guide:
If you need a map/hash use Object instead of Array in these cases because
the features that you want are actually features of Object and not of Array.
Array just happens to extend Object (like any other object in JS and
therefore you might as well have used Date, RegExp or String).
(imported from commit 048e7a640137f3919c0097a421b7b6c366b65cfe)
This also cleans up the autocomplete source specifications,
making the three typeaheads all look fairly consistent.
(imported from commit e72655d715db74cfc9ab45b51e7e2ff9e8ea84c5)
While we're at it, fix the fact that we're currently not adding
entries to the subscriptions_table at all when we do
subscribe-and-send.
(imported from commit 99bf574a4a296463e562a44186e2282654464542)
Keegan McAllister
Waseem Daher
Tim Abbott
Zev Benjamin