Support installing plugins by relative path

```
helm plugins install .
```

Newer gits don't like checking out an empty string.

```
empty string is not a valid pathspec. please use . instead if you meant to match all paths
```

Tiller should only enforce what we expect from Helm

update docs to demonstrate best practices in regards to named templates

Added ReactiveOps Autohelm to the related tools list

Update download links to 2.8.1 binaries

Fix 'Namesapce' typo

Add Helm.NET to the list of related Helm tools

chore(README): add ref to helm mailing list

Typo once/one

fix the bug in test code  that leaves behind temp directories during build

fix(helm): fix the bug in test code 'cmd/helm/create_test.go' that leaves behind temp directories during build

    The build process no longer leaves behind 'helm-create-*' temp directories.
Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

fix a typo in client

feat(helm): add --template flag to `helm version` 

`helm version --template` prints the client and server version info in
the provided template format.

minor docs change: change child-parent title & links to fix links

Update charts_tips_and_tricks.md

https://github.com/kubernetes/helm/pull/3183 added a keepalive to the Helm client of 30s period, while Tiller was never configured to permit this, keeping the default minimum keepalive period of 5 minutes, disconnecting any clients which ping more regularly than this.

This commit enforces a minimum that is lower than what Helm is configured for, preventing these disconnections, and thus fixes #3409.

defer in loop may cause resource leak

defer statement executes only when function return, and the resource still be hold during loop. Release the resource manually when not needed.

fix(helm): fix the build-time golint warning on 'cmd/helm/install.go'

When building helm, golint no longer generates the following warning:

cmd/helm/install.go:502:9:warning: if block ends with a return statement, so drop this else and outdent its block (golint)
Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

fix(grpc): Fixes issue where message sending limited to 4mb

Revert "feat(helm): adding kubeconfig flag"

Between grpc 1.2.x and 1.7.x there was an API change. The
previous MaxMsgSize is now a wrapper around MaxRecvMsgSize. This
change now sets the MaxRecvMsgSize and MaxSendMsgSize which need
to be set independently.

remove references to the term "master"

fix(api-machinery): Fixes patching for unstructured objects

HELM DOC TYPO

CRDs and other objects seen as unstructured cannot use strategic
merge patching. It has never been supported on CRDs. Previously,
cases like unstructured objects could have caused an unregistered
error. This is no longer the case.

This change explicitly looks for unstructured objects and handles
those using json merge patching.

Closes #3382