implement a version string in the nepho class, and a command line option for vetsion
flake8 fixes
add in check for presence of vagrant and skip unsuccessful imports gracefully.
more flake8 fixes
Merge pull request #236 from huit/nepho-version

implement a version string in the nepho class, and a command line option
changed non-existent subprocess.ProcessException to OSError
Merge pull request #237 from huit/fix-vagrant-Unsightly-traceback

Fix vagrant unsightly tracebacks and errors
mix merge conflict from master