Merge pull request #79 from elliot42/master

Auto-discover location of `pip`
Merge pull request #81 from elliot42/master

Enable retrieving build artifacts from CircleCI
Add AWS utility functions from fmcv
Merge pull request #82 from kyptin/cf-aws-util-functions

Add AWS utility functions from fmcv
Update README

De-emphasize remote execute, emphasing library approach.
We'll want some code samples in here eventually.