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

This adds a link to the Go template docs regarding whitespace.

New properties are available to template developers.

Closes #1554

This raises the limit from 14 to 53 chars based on the Kubernetes 1.4
name limit.

Closes #1528

This documents YAML and provides information about how Helm and
Kubernetes interpret the YAML.

Consistently add spacing for '{{ $foo }}'

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.