chore(glide): update to Sprig 2.12.0

fix(helm): add --devel flag to allow dev releases again

fix(lint): add KubeVersion and TillerVersion to linter

2.4.0 stopped installing development versions by default. This allows
the user to re-enable that support by setting --devel.

Closes #2407

fix(Dockerfile): add ca-certificates

fix(*): return non-zero exit code on test failure

Closes #2311

fix(windows): Updating docker/distribution

Kubernetes has a dependency on a development version of
github.com/docker/distribution that does not work for windows. Helm
picks up this dependency and it breaks helm development on win. The
bug was later fixed. There is an issue on Kubernetes to update
to a newer version. In the meantime, this change causes helm to
use the latest stable release for that minor version.

Fixes #2396
Relates to https://github.com/kubernetes/kubernetes/issues/45377

Write repo file using atomicfile

Closes #2393

This prevents clients from seeing half-written files because
on POSIX systems renaming a file is an atomic operation.

Drive-by: Add test for repo file permission.

Fix for vbom.ml bootstrap

feat(cmd/helm/installer): add support for upgrading service account

* Adds update option to plugin command

Fixes issues/2385 - helm install silently updates the plugin, if it pre-existed

* Added tests for new methods for plugin update

* Updated docs

* Updated review comments :)

* Return error exit code when there is error

minor typo fix

Add friendly output for helm package

* resolves #2089

chore(glide): bump kubernetes to v1.6.3

Add check for getting kubeclient

added possibility to set desired install version. See issue #2380

ref(docs): add ref as commit type

fix(tiller): Fixes bug with `--wait` and updated deployments

fix(Dockerfile): only copy tiller binary in Dockerfile

Fixed issues reported by test-style

The current methodology generated its own RS slice instead of using
a helper method that uses a `clientset`. This caused some issues where
`FindNewReplicaSet` always returned `nil`. This switches the method and
removes some unneeded API calls and code.

Closes #2426

Fix minor typo in test doc

Fixes various issues related to plugin command