This provides support for "global" variables. It does this by
declaring "global" to be a special namespace. It then copies this
namespace into every subchart, coalescing it into any "global"
namespace found there.

The net result is that if "global.foo" is set in the YAML file, it
will be available to every chart/subchart as ".global.foo" regardless of
where that chart is in the subchart tree.

fix(helm): s/arbitary/arbitrary/

fix(chartutil): move values coalescing into chartutil

docs(*): fix links

fix(helm): add .tgz to package names on fetch

fix(helm): produce error if package name is inconsistent

'helm package' now produces an error if the directory name and the name
in Chart.yaml are not the same.

Closes #812

Closes #809

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