because you know, go vender n'stuff

fix(test-style): fix formatting and comments

Add flake8 test and fix pep8 style in expansion scripts

fix(cli): revert to older deploy formatting

feat(cli): added back 'helm release'

fix(version): use build version in helm

This re-adds the top level Helm command that sends a packaged helm chart
to the server. This existed in an earlier draft of the Helm-DM client,
but it fell through the cracks when we re-organized the helm commands.

Prior to merging the projects, the version of `helm deploy` used a
different REST API (one without YAML in JSON). Post-merge, we need to
revert back to the older common.Template version.

As part of this, I switched an io.ReadCloser back to an io.Reader
because there is nowhere where the Closer part is used. The http lib
does not close a reader passed to it.

This fixes a number of formatting and style issues.

Closes #370

Point users to the latest release in README.md

doc(CONTRIBUTING): modify the procedural aspects

ref(client): rename pkg/dm to pkg/client

feat(testcov): add a test coverage helper script

fix(rootfs): check $DOCKER_PROJECT if registry is gcr.io

fixing shell variable references

fix(gitignore): ignore nohup.out

This removes some unnecessary process details, removes some of the more
hierarchical/authoritarian elements, and adjust the language to reflect
a more open process.

Proposed: Add Vagrantfile for build

chore(*): update img versions for `helm dm install`

Updated project governance

Fix build on GNU make

fix(*): allow local docker registry

fix(README.md): use CircleCI badge instead of TravisCI badge

This fix supersedes #323. It applies basically the same fixes:

- local docker registries are now supported
- kubectl is not downloaded on every build

Also, added a fix for the case where `docker version` failed because the
Docker daemon crashed, and consequently spuriously propmted the user to
re-install docker.

I added support for $DOCKER_PROJECT instead of just $PROJECT because the
later is a little too generic for a shell env var. We can deprecate
$PROJECT later.

I did not add back in the better tool checks in bootstrap because
CircleCI doesn't have the `command` command.