feat(tiller): add Files map to templates

Templates can now access the non-template files in a chart by using
the '{{.Files}}' map inside of a template.

Relates to #950

feat(helm,tiller): add --reuse-name flag to helm install

feat(kube): reap related resources on delete

This will allow helm install to re-use names for releases that were
already deleted.

chore(README): link to Semver 2 spec

fix(tiller): remove partials and empty manifests

This removes partials and empty manifests during the sortHooks
operation. Doing so makes sortHooks the defacto place for sorting
manifests, hooks, and partials.

Closes #991

fix(cmd): set description for inspect

feat(*): add upgrade command and validations

Add subcommands to inspect only chart or values

fix(cmd): ensure tiller is running for connection

fix(tiller): merge -f values correctly

I edited releaseMock as part of this PR