Fixes to conventions.
We now support "remote commands".
Added "remote command" support.
Version increment.
Named a test for remote-commands.
Updated README.
Updated README.
"remote shell" is now supported (not nonblocking).
Implemented RemoteShellProcessor for easy shells.
Now use read_nonblocking(). Obs'd set_block().
Errors are now in SSH and channel errors.
Added sftp.recurse() function.
Untested: Wrote mirror routines and local recurse.

There are still unfinished deps.