example_01/access_machine.py: Improve messaging a bit.
configure.py: Use os.path.expanduser

so that stuff like:

   ~/.ssh/devops.pem

works.
Merge pull request #43 from msabramo/configure.py_expanduser

configure.py: Use os.path.expanduser
Merge pull request #45 from msabramo/example_01_improve_messaging

example_01/access_machine.py: Improve messaging a bit.
configure.py: Remove extra blank lines in output