Signed-off-by: Adam Reese <adam@reese.io>

Tiller currently hangs indefinitely when deadlocks arise from certain
concurrent operations. This commit removes the nested mutex locking
system from pkg/Storage and relies on resource contention controls in k8s.

Closes #2560

Adds a generic logging interface to importable packages.

Rebase on kubernetes v1.6

Fixes https://github.com/kubernetes/helm/issues/2251
In case a user tries to delete a non-existent release,
the error message displayed was missing release-name.

If a selector is created from invalid values it will return nil.

Which is EVERYTHING!!!

closes: #2115

This commit changes the configmap storage driver to compress
the serialized release before storing it as a base64 encoded string.
This change is backward compatible as it handles existing releases
gracefully by skipping the decompression step when the gzip magic
header is not present.

There were a few places where error messages were accessing properties
of objects that were nil because of the error.

Closes #1374

This adds a Tiller CLI flag to override the default, and tests to
make sure that the default comes up as expected.