Add some basic development setup steps
Add some basic development setup steps

These aren't perfect (the package names will differ on other distros,
ideally a virtualenv would be set up, or a Vagrant project file could
be used instead), however will hopefully save others hitting a number
of unclear errors that require stack overflow research to resolve.

peterbe/whatsdeployed,peterbe/whatsdeployed,peterbe/whatsdeployed,peterbe/whatsdeployed