I noticed that the message type CDEMultipeerMessageTypeFileRetrievalResponse was going unused in the entire project, so I re-named and repurposed it to CDEMultipeerMessageTypeFileRetrievalResponseNoFiles to send back in the case where there are no files to be sent back. I've also added another optional method on CDEMultipeerConnection to handle this response.
This PR addresses #268.
I noticed that the message type
CDEMultipeerMessageTypeFileRetrievalResponsewas going unused in the entire project, so I re-named and repurposed it toCDEMultipeerMessageTypeFileRetrievalResponseNoFilesto send back in the case where there are no files to be sent back. I've also added another optional method onCDEMultipeerConnectionto handle this response.