Helper functions for templating

[JordanSussman]

Shortcuts for common more verbose go templates.

ability: |-
        {{ range .abilities }}
          - {{ .ability.name -}}
        {{ end }}

vs

ability: .abilities[*].ability.name

[wass3r]

That example is probably not great, but maybe consider adding support for https://github.com/PaesslerAG/jsonpath so you don't have to fiddle with Go templates for pulling out nested values