Berks improvements

:watch: This PR will *not* be merged. Instead, it is slowly being converted into more manageable PRs. After that, it will go away so the individual improvements can be discussed apart. 

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This is a crazy long list of improvements that I've been working on. There was no easy way to separate this into different PRs reliably.  

## Most Notable Improvements
- Build is now about ~2min locally, ~7min on travis from an empty bundle
- Removed unnecessary dependencies (WIP)
- Full CZ integration - including on local machines

:warning: I've commented out the TK specs until we figure out what to do with them...

:watch: WIP. :red_circle: do not merge yet :red_circle: 

- [ ] Rename cucumber output to be consistent
- [ ] Remove more dependencies