- send_data() (only defined in .h-file - never implemented)
- Adds correct formats when adding message body.

Thanks to Peter Olsson for spotting this in FS-2737

MS compiler doesn't have strncpy, we need another method to
ensure that the body is null-terminated

         add ftdm core state filtering for debugging

DeviceToUserDataMessage
DeviceToUserDataResponseMessage
DeviceToUserDataVersion1Message
DeviceToUserDataResponseVersion1Message
UserToDeviceDataMessage
UserToDeviceDataVersion1Message

sprinkle digit_timeout into switch_ivr_read and switch_ivr_play_and_get_digits and the higher level variants

fix switch_ivr_collect_digits_callback to allow an args pointer with null callback to work like other apis

  * Updated Uploaders list
  * Updated Standards-Version to 3.9.1