This package provides a more generic version of what's currently modeled
by the likes of lang.Scope and lang.Data, designed to avoid having a huge
single type that must know about everything in the language and, for this
package's purposes alone, to avoid knowing anything about the language at
all except that it uses HCL.
This is currently just an experiment not used by anything, and so is dead
code aside from the contrived mini-language implemented in example_test.go.
Signed-off-by: Martin Atkins <mart@degeneration.co.uk>
5c3180f30f