Convert XDD into python package

XDD now also provides a Python package.  This update also includes more
precondition checks.
Create Python xddmcp

Create Python-based xddmcp command that enables multi-host
file transfer operations.  Code largely reimplements xddcp
shell script functions with support for multiple source
hosts.
XDDMCP support works

XDDMCP now supports multi-host to single host transfers.  3rd party
transfers.  And most of the options supplied by xddcp.  Recursive
file transfers are the only big remaining piece.
Add required Python packages

Adding local versions of the Python packages leveraged by XDD's
xddmcp copy tool.
Update xddmcp to provide logging

These enhancements add some support for the verbose flag in
XDDMCP.