fixes issues seen in master with `make build-cross` for windows

This reverts commit edd4e561.

This reverts commit 965cb7fd.

When running glide update there are errors due to pinned versions
in the glide.yaml file mixed with getting a more recent version of
kubernetes. client-go needs a newer version of go-autorest.

Note, go-autorest is pinned to v8.0.0 rather than the latest
release of v8.4.0 because kubernetes is pinned to v8.0.0.

In prerelease numbers there was the potential for number comparison
issues. For example, 99 being greater than 103. This is now fixed.

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

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.

    Reverted the version of mergo to a version that was known to work
    with both kubernetes and sprig.

    Closes #2376

This adds the `merge` function, among other things.

[WARN]	Unable to checkout vbom.ml/util
[ERROR]	Update failed for vbom.ml/util: Cannot detect VCS
[ERROR]	Failed to install: Cannot detect VCS
Makefile:120: recipe for target 'bootstrap' failed

This fixes a TOML panic by replacing one parser library with another.
The older library did not gracefully handle reflection issues, and so
was prone to panic. The new one is not great, but it doesn't seem to
panic.

Closes #2271

Effectively, this switches us to gRPC's internal version 4. This is
compatible with protoc 3.2 and grpc-go 1.2.1.

Rebase on kubernetes v1.6

Add plugin management subcommands for installing and removing plugins
to `$HELM_HOST/plugins`.

Install accepts a vcs url or a local directory.

```
$ helm plugin install http://github.com/adamreese/helm-env
Installed plugin: env

$ helm plugin list
NAME    	VERSION	DESCRIPTION
env     	0.1.0  	Print out the helm environment.

$ helm plugin remove env
Removed plugin: env
```

closes #1977

There was a bug in SemVer 1.2.2 that miscalculated a couple of
comparison patterns.

Closes #2087

Possible fix for #1639

Closes #1744

There was a hyphen range bug in semver that prevented constraints
in the form of v2.3.5-20161202202307-sha.e8fc5e5. This would be
parsed incorrectly as a hyphen range and then fail. The bug in
semver was fixed in semver v1.2.2 for this issue.

This adds shasum, int, and float64 functions, and fixes quote escaping
for 'quote'.

Closes #1524

A bug in the semver package caused prereleases to be included in
version ranges by default. Prereleases, per the spec, are not
expected to be API compatible with the releases themselves.

The semver package now ignores prereleases when evaluating
constraints when the constraint does not contain a prerelease. If
the constraint contains a prerelease they are evaluated.

- decouple tunnel from kube client
- add context switching for init cmd
- add unit tests for installer and init command
- refactor installer and remove unused code