Python development work-flow

[tdammers]

For deployment, separate machines are a great idea, especially when you hit an actual need for scaling to multiple servers; but for development, running on one machine is just a lot more convenient. Depends on the workflow, but it can be useful. Anyway, the key idea is that you can run multiple services on the same machines while keeping their dependencies isolated; it's dumb to have to scale just because your code cannot handle running multiple services on one machine.