This adds a hidden 'helm doc' command that generates documentation out
of the Helm help text.

Currently it can create:

- man pages for HELM(1)
- Markdown documentation
- bash autocompletions

Those are the three built-ins for Cobra.

The command is hidden so that it doesn't show up to the regular user,
since this is really a specialized task. It has the advantage of making
it trivially easy to install man pages and bash completion at installation time.

shasum is not on many platforms (like centos), use openssl instead.

gometalinter has moved to versioned releases. The latest of the v1
major versioned releases can be retrieved through pkg.in. This
change moves gometalinter use to the latest v1 release.

Downloading of charts and helm itself happened over http. This
change moves to use https as that is available with valid certs.

A bucket name in the path can be migrated to a custom k8s domain
name. This is in preperation for that.

This adds 'scripts/get`, which is a bash script for fetching and
installing the Helm client. It has the following features:

- It uses the GitHub API to discover the latest release
- It downloads the SHA256 checksum and verifies the binary using it
- It does basic tests on the installation

Attempt for build speed record

Running in parallel will crash a circle ci node. Disabling until we can
build in some safeguards.

```
./scripts/coverage.sh  37.25s user 4.15s system 144% cpu 28.615 total
```
```
./scripts/coverage.sh  47.96s user 6.77s system 567% cpu 9.647 total
```

circle ci can't seem to find the image when it is build in a parallel
container.

hyperkube tries to create the components in a namespace that does not
exist.