Wait for pending messages when pausing consumers.
Better way to manage notify_paused_and_quiet list.
Merge branch 'feature/issue-616-pause-consumers-waits-for-pending-messages' into develop
make outbound encoding configurable
test case for submit_sm_encoding
Merge branch 'feature/issue-332-outbound-char-sets' into develop
allow specifying of data_coding
allow specifying of data_coding
Merge branch 'feature/issue-619-smpp-non-default-data-coding' into develop
Merge branch 'develop' into feature/issue-735-remove-giant-string-from-vumi-utils