feat(helm): add 'helm package' command

fix(storage): Use a CRUD interface

Fixes #23

fix(Makefile): disable verbose on build

feat(chart): add chart package

feat(storage): add basic implementation of storage

feat(init): add helm init

+ -i flag to override tiller image

This is the chart package from k8s/helm, modified for usage here.

This adds a higher level set of tests for storage.

feat(Makefile): add docker build tooling

This is an in-memory storage layer for storing releases. This will be
superseded by the Kubernetes ConfigMap implementtion.

Still needs a dockerfile

/cc @michelleN

fix(environment): make KubeClient take multiple files

fix(tiller): set up Tiller environment correctly

Rather than just taking a []byte for Install, take a map of
filenames->contents.

And structure the tests better.

feat(engine): add template engine

fix(scripts): go vet is built into go

feat(Makefile): add Makefile

fix(environment): add tests for Environment

feat(proto): stub out a Chartfile message