RFC: Structure of Examples

There's a number of ways that we can organize these examples. The current planned method is to structure the examples as a monorepo using lerna. After thinking through this more I think using git submodules might be a better solution. I expect that most users would only want to install the dependencies for the example they want to run. So if they use lerna and bootstrap all the lerna packages they'd be installing a lot of modules they don't need. Git submodules removes this issue by letting the user `cd` into the example they want to run and then installing the dependencies for that project.

Thoughts on this?