Support for creating docs of named templates in library charts

[stoetti]

We are using library charts to distribute common templates using the named template feature of helm. As the number of development teams and new developers grow the documentation of those templates becomes more and more important.

Therefore, it would be great if the documentation of those templates could be generated just like the doc of the possible values. The default helm chart's _helper.tpl file includes documentation headers for each named template which would be a good starting point for defining a convention how to determine the right documentation for the right template.

[thepaulmacca]

I've been thinking about this as well - would love to know if anyone out there has come up with a way of doing it!