fix(ci): use gcloud absolute path

fix(gitignore): die, DS_Store, die.

fix(chartutil): fix nil error on values

Fixes: https://github.com/kubernetes/helm/issues/803

feat(ci): push canary image on successful ci build

fix(docs): add sources field on example chart.yaml

fix(docs): mark templates and charts directories optional

feat(scripts): add script to sync chart repos

Closes #797

feat(chartutil): Update to use YAML instead of TOML for values files.

fix(#795): start probes server on expected port, ':44135'

chore(*): use k8s.io as the import path

Fixed typo in charts.md

Add HTTP server for liveness and readiness probes

Fixed URL parse

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.