Verify template documentation

[seancorfield]

It has:

;; template.edn
{:transform [["resources" "resources/{{top/file}}"]]}

But I think that isn't actually legal because the tuple requires three or four elements.

Also need to document the open/close tuple for templates.

[seancorfield]

In #16 I changed the Spec to s/cat so one or more elements are legal and the syntax updated to include an optional :raw at the end to skip the :replace option on copy-dir so binary files are not corrupted.