A regression was introduced which required chart download URLs have the
same URL prefix as the chart repo that referenced them. A second
regression transformed that URL into a request for the latest version of
that chart, sidestepping semver constraints.

This fix closes both issues, which were present in the same function.

Closes #1845
Closes #1846

ref(kube): misc code cleanup

fix(kube): reap deleted resources during upgrade

feat(helm): add --reset-values flag to 'helm upgrade'

fix(helm) change name length limit to 63 for `helm create`

fix(Makefile): fix glob overriding packaged tar

Fix typo in help text for list cmd

since kubernetes 1.4, the upper limit for resource name is 63 characters,
so it is better to change the template when running `helm create` accordingly.

ref(kube): add Result to abstract a collection of resources

feat(helm): Create a Service definition for using Tiller in-cluster

feat(helm): Linter validations for Chart icon property

feat(helm): allow specifying --set multiple times

bugfix(tiller): replace + with _ in "helm create" template Chart version

Logging real name of the failing hook

The --reset-values flag on upgrade instructs Tiller to reset the
upgraded release to the chart's built-in values.yaml, and ignore the
last install's overridden values.

Closes #1569

Http client with TLS

fix(tiller): add missing name to status response

fix(tiller): don't update purged releases

feat(tiller): add {{.Capabilities}} object

fixes #1807

This adds the {{.Capabilities}} object to the template variables so that
chart authors can write charts that are aware of teh Kubernetes
capabilities of the current cluster.

Closes #1608

"spring" should be "sprig"