fix(manager): add documentation to pos function

fix(client): save 16 bits for Adam

fix(*): update import paths for helm repo naming

fix(manager): refactor REST API to make it modular

This updates path grabbing to match the new URI matcher.

This removes the Routes interface and routesMap struct in favor of just
maintaining the routes inside of the handler.

This modifies the startup and initial handling of the REST API to make
it modular, remove the init() methods, and remove reliance on global
vars.

ref(test-style): add a script for linting tools

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.