Rdeploy

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- Added support for Google Artifact Registry for helm charts.

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- Update helm stable repo url to new version.

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- Add decode-secret command
- Fix MANIFEST.in

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- Migrated to use kubectl run command. Currently supporting the
ExtensionsV1beta1/deployment

a8a490a updated working management pod spec and command definition for both manage and shell commands
78d207c Created a command for building the management command

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- Fix bug in helm install command version parsing.

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- New rdeploy.yaml format, added rdeploy.example.yaml.
- Added support for Azure in the set_context, and cloudbuild commands. Azure details to be provided in the `cloud_provider` field in rdeploy.yaml.
- Added support for helm 3 in the `install` and `upgrade` commands.
- Added helm_setup command which installs a specific helm version in a local opt directory. This can be enabled by specifying `use_system_helm: false` and `helm_version` in rdeploy.yaml.
- Added a new `helm` command.
- Added aliases for all commands with underscores. I.e. `rdeploy set-context` is now equivalent to `rdeploy set_context`
- Renamed the `bash` to `shell`, keeping `bash` as an alias.