KAZOO-1933: send emails to BCC list

When a list of BCCs is available, and the config flag is true, iterate
over the list of BCCs to send the email. This is to work around a
limitation in gen_smtp_client that doesn't honor BCCs in the initial
outgoind email.
KAZOO-2729: cleanup, types, specs, formatting
KAZOO-2729: use macro for config cat
KAZOO-2729: namespace-able token parameters
KAZOO-2729: update crossbar to include app namespace
KAZOO-2729: namespace doodle token bucket params
KAZOO-2729: update blackhole namespace
KAZOO-2729: use callflow namespace for buckets
KAZOO-2729: update Makefile
KAZOO-2729: documented how to configure per-app settings for buckets
KAZOO-3150: Pagination working on a sorted basis for users
KAZOO-3105: Fix envelope
match lists: fix respone for PUT w/ ListId & EntryId
KAZOO-3150: Change users/crossbar_listing
Merge pull request #635 from 2600hz/KAZOO-3150

Kazoo 3150
Merge pull request #640 from siplabs/KAZOO-3163

KAZOO-3163: match lists: fix respone for PUT w/ ListId & EntryId
KAZOO-3074: listen for login DTMF after prompting
allow GET to initiate click2call
KAZOO-3074: don't block on prompt
Merge pull request #643 from 2600hz/KAZOO-3074

KAZOO-3074: listen for login DTMF after prompting