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 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

clean up the formatting, remove unnecessary git_version from version as per discussions with @areese

Signed-off-by: Keerthan Reddy Mala (kmala) <kmala@deis.com>

fix(ci): fix typo in auth file reference

After d1488f1d I forgot to add this to
the TOC.

Lifted from https://raw.githubusercontent.com/kubernetes/kubernetes-template-project/master/README.md

code-of-conduct: use the upstream language

feat(README): add community contact points

feat(ci): build canary helm binaries using CI

README: fix small typo