Correct a bug whne cloning a 'Remote'.
Correct a bug whne cloning a 'Remote'.

The 'clone' method of 'Local' and 'Remote' objects allows to clone the
object and enforcing all attributes are copied in the resulted object.

For the 'Remote' object, the 'ip' attribute was not copied and thus
preventing some functions (like functions for remotely copying files)
to work.

fmenabe/python-unix