removed cruft in packages/kujua-sms/kujua-sms/lists.js
added timezone support to exports, towards #394

Upgraded moment to 2.5.0 and added moment-timezone module.

Pass in timezone data/query param to list that generates xml/csv export
so dates can be exported in locale timezone. Added two tests.

Also made minor changes towards #421 by removing message data from the
data record/form generated data export. Added stub list functions for
messages export.

Warning: this changes export format, columns at the end of the export
with message data are removed, like, incoming, outgoing, responses and
scheduled tasks.