file io

- We still need to come up with a naming metaphor for this!
- it is a pipeline communication to stream a file from a server to a client.
- It follows a model similar to: http://zguide.zeromq.org/c:fileio3
improve the API by declaring the time unit.  
```FileRecv::SetTimeOutInMs```      (or use std::chromo::milliseconds instead of int   but that would be unnecessary I think)