WHISTLE-42: fix typo
WHISTLE-1842: update schema to include warning about side effect

WHISTLE-1842: update specs, add types, cleanup

WHISTLE-1842: dialyzer update

WHISTLE-1842: remove the delete flag from the notification payload

WHISTLE-1842: remove the delete code from the notify_vm

WHISTLE-1842: spec updates

WHISTLE-1842: add notify_update api to report back to requestor on status of notification

WHISTLE-1842: update spec

WHISTLE-1842: send an update if vm->email isn't configured

WHISLTE-1842: sleep only if directly saving the voicemail

WHISTLE-1842: spec and type updates

WHISTLE-1842: increase timeout for notification update

WHISTLE-1842: include msg-id from notification payload in update

WHISTLE-42: increase default agent ring timeout to 15 seconds

WHISTLE-1842: updated logging, cleanup unused vars

WHISTLE-42: spec updates, gen_listener handling 4 tuple return from handle_call better

WHISTLE-42: fix typo