Write some new unit tests for expandybird

Fix expandybird Python importing to be lazy

This avoids the following bug:
template/main.py
template/z.py

main.py imports templates.z

Some nice cleanups now that pkg/registry is no longer needed

Second round of refactoring for Manager

test(cli): add test pattern for cli tests

circleci only supports go1.5

helm chart pack [PATH]

Expandybird: Fix Jinja file imports

First round of refactoring for Manager

Move kubernetes types out of common

feat(cli): implement helm deployment show

ref(repo:) use run function for error handling

feat(cli): add 'helm chart create'