This is actually several refactors in one:
* rename "fileContent" function to "insertFile"
* pass the resource set path to the "insetFile" function
* update docs and example with a pipeline including indentation
adjustments for the inserted file
Adds a 'fileContent' template function to insert the literal contents
of a file specified in the template.
Signed-off-by: Niklas Wik <niklas.wik@nokia.com>
Documents the structure of resource sets and the fields necessary for including
them in cluster configurations.
Also adds some words about nested resource sets and the like.
Adds documentation for `if` and `range` statements in Go templates
and also more explicitly points people at the Go documentation for
more information.