closes #1244

feat(*): add helm rollback functionality

chore(repo): Rename default charts repo to 'stable'

fix(tiller): Order the manifests before sending to k8s

This orders manifests both for installs and deletes so that the
manifests are ordered by kind.

Closes #1228

This feature allows you to rollback release to the
previous version of release.
resolves #1004

feat(helm): update helm search

Switch 'helm search' from file crawling to using the indices. Also
add scorable indexing, forward porting the search code I originally
wrote for Helm Classic.

Closes #1226
Partially addresses #1199

chore(*): bump grpc to 1.0.1-GA

feat(helm): add 'helm upgrade --install' support

fix(helm): if server is old, report this in a friendly way

feat(tiller): add toYaml template function

If 'helm version' is run on an old server, it will emit an error telling
you the server is too old.

Closes #1223

This makes it possible to run an upgrade that will install a release if
it doesn't already exist.

Closes #1042

This adds the function toYaml to the Engine template functions.

Closes #1225

feat(helm): make long listing default for helm list

feat(helm): add requirements.yaml support

This removes --long and adds --short,-q

The default listing is now the long listing, which matches the behavior
of all of the other listing commands.

Closes #1215

This also refactors significant portions of the CLI, moving much of the
shared code into a library.

Also in this release, a testing repository server has been added.

feat(*): add api version checks

ref(helm): convert repo commands to new format

issue #1203

fix(helm-list): filter configmaps by owner=TILLER

feat(repo): use OCI style digest identifiers

feat(*): add git tree state to binaries

README: add History to TOC and footer for CoC

Use the same format as the Open Container Initiative for a digest
string. https://github.com/opencontainers/image-spec/blob/master/descriptor.md#digests-and-verification

Fixes #1166

* clean up version output

first cut of version on client and server

fix(tiller): Upgrade shouldn't fail if there are no changes