Feature Request: Consider dropping in the sprig template library

[andrewhowdencom]

Yo. Helm (kubernetes) is using the Spring template library, and it's proved hella useful for generating the Yaml files that Kubernetes requires. Such a thing should be reasonably easy to integrate with a project like this. It would dramatically increase the possible template outputs, and make this tool heaps more useful for more complex files.

See https://godoc.org/github.com/Masterminds/sprig

[tmrts]

@andrewhowdencom thanks for the suggestion, sprig contains a good amount of functions that I wanted to integrate, its very nice