Beam: beamsh uses 'log' command to pass stdout
Beam: leave debugging hooks for easy step-by-step inspection of the FD table
Beam: don't close the attachment FD when closing superfluous FDs
dockerscript: <!> is not a special character
Beam: fix bug in beamsh which 'swapped' FDs because of underlying implementation of net.FileConn
Beam: more powerful beamsh example

* Automatically switch to interactive mode when stdin is a terminal

* Basic implementation of "responses"