More dependency movement from zpl, incremental design improvements.

Made token_fmt more ergonomic, going to have to use a similar behavior with the upfront body constructors.

test/Readme.md

@@ -8,7 +8,4 @@ be better on in c++ as templates, since the templates they generate are trivial
 An exmaple of a non-trival generation is a container for elements with SOA or AOS policy for layout.
 (If a unified element syntax is desired)
 
-The test is divided between two major sets of tests: Parsed and Nonparsed.
-
-Parsed uses the parsing api strictly.
-NonParsed only uses the upfront and incremental constructors.
+The test is divided between two major sets of tests: Parsed and Upfront.