Command.run preserves existing environment

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Allow password to be omitted from command line options

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Add a readme file

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Merge pull request #3 from mcclurmc/reamde

Add a README