https://github.com/kubernetes/helm -> https://github.com/helm/helm
https://github.com/kubernetes/charts -> https://github.com/helm/charts



Signed-off-by: Roc Chan <roc@imroc.io>

* Remove Tiller reference from the docs

Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

* Update comments after review

- https://github.com/helm/helm/pull/4788#discussion_r226037034
- https://github.com/helm/helm/pull/4788#discussion_r226037064
- https://github.com/helm/helm/pull/4788#discussion_r226037806
- https://github.com/helm/helm/pull/4788#discussion_r226038492
- https://github.com/helm/helm/pull/4788#discussion_r226039202
- https://github.com/helm/helm/pull/4788#discussion_r226039894



Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

Removes Time, Namespace, and Revision from being exposed to templates to
make template rendering discrete and repeatable.

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

New properties are available to template developers.

Closes #1554

This adds a detailed document on writing templates in Helm. This is NOT
a best-practices guide, but a thorough introduction to templates in
Helm.