Send/Receive for SAB

Paratext S/R is beautiful for us because it is very hard for the end user to lose data or configuration. All they have to do is be fairly consistent with issuing a S/R.

With SAB/RAB keeping track of change top project files, timing files, audio files, is very complicated. We have multiple people working on the same project and passing them around is very error prone. I realize the size of audio files could be problematic (i.e. slow S/R times, especially for slow internet locations), but if S/R could do everything except the audio that would be huge help.