feat(chartutil): add Save function

feat(kube): use env variable to control kube logging

This replicates the previous Save function, which can save an
in-memory Chart proto to a tgz.

Removes command line flags and adds the environment variable
`KUBE_LOG_LEVEL`

chore(docs): remove ambigious note

feat(chartutil): add chartutil package

This is a refactor of the loader to use in-memory buffers instead of
trying to optimize for memory usage by delaying reads until the last
possible moment. Since charts tend to stay well below 1M in size, this
makes more sense, and is easier to work with.

Do not return an error if no matches found

chore(docs): add chart repository docs

do not return errors and do not print any messages about no matches found to be more like unix commands

feat(version): statically link version at build time

fix(tiller): fix install function

fix(helm): stop requiring a values.toml in a chart

fix(docs): fix typo

Because, occur the following error when `createNS` flag is true.
`panic: template: redefinition of template "manifest"`

fix(cmd): rename verbose flag to debug

fix(Makefile): push to gcr using gcloud

Remove a naming conflict with glog which allows for debugging kubernetes
requests.

Charts should not require a values.toml file -- some charts will just be
manifests with nothing configurable.

Included a link to 12factor.net

Fix for dead link

Not every one is aware of the 12factor.net so included the link.

Updated the link which was dead pointing to `https://github.com/deis/charts`

ref(helm): add default repository on init step

... so we don't rely on external services
in unit tests :)

See #718

docs(chart): updated chart documentation

fix(style): cleanup coding style on error returns

feat(tunnel): wire in the tunnel setup and teardown

feat(tunnel): add logic for detecting tiller pod