charts.md updates

Updating docs to prioritize `requirements.yaml` over `charts/` directory.

As `requirements.yaml` is the recommended strategy, let's document that first to make sure no one jumps the gun and goes ahead to implement manual deps via `charts/` just because they didn't read the whole section.

Fixed helm test sample.

The current sample doesn't work as documented.

New sample based on https://github.com/kubernetes/charts/pull/1156.

ref(helm): make FakeReleaseClient public

Update standard label docs

Update plugins.md

* give an uniform check for release process

* fixed as the review of adamreese: update the err message when releasename is empty and update the test units.

* fixed as the review of bacongobbler: add more detail information to return message. the regex rule is added to the return message.

Align docs to what we currently recommend as best practices.

Fix markdown syntax in doc

Added omitempty to Requirements struct

Update README with links to docs.helm.sh

Improve chart examples

This was needed to get correct sha for requirements.yaml and requirements.lock
Fixes https://github.com/kubernetes/helm/issues/2598

* <chart>.tgz  will now be downloaded to "$HELM_HOME/cache/archive" directory

Fixes https://github.com/kubernetes/helm/issues/2142

* Added archive location to helm init

Improve 'helm create'

typo

docs: Fix typo in command line

ref(tiller): cleanup goimports

Added "tpl" template function

ref(tiller): refactor out cobra from tiller

ref(helm): mix bag of syntax cleanup in cmd/helm

feat(helm): support array index format for --set.

* Use versioned API types from the client-go library

Wherever possible, use the k8s.io/client-go/kubernetes.Interface type
in favor of the client-related types from package

  k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset

The latter are still required by the kubectl "reaper" types used in
the "installer" and "kube" packages.

* Accept the default deployment replica count of one

Don't bother requesting a single replica explicitly.

This adds support for specifying list position with an array index using
`--set`. For example, this now works: `--set servers[0].port=8080`

fix(tiller): track hooks in multi-def manifests