Changelog for cuddle-1.0.0.0

Changelog for `cuddle`

Rewrote the prettyprinter to make the output more human-readable.
Added collectFromInit to make it possible to specify the order of definitions manually. collectFrom and collectFromInit now expect HuddleItems in their arguments
More Huddle terms now accept comments (e.g. ArrayEntry, ArrayChoice)
Parser now preserves most comments.

Support having keys in group entries. This is needed when using a group to define a map, or when wishing to include keys in for-use-in-array groups for documentation purposes. This may introduce problems with existing specifications where some type hints (using 'a') are needed to properly type entries in groups, where previously they were unambiguous.

Note that it is not yet supported to use a group inside a map, where the issue of merging keys arises.

Add support for constraints on references and generic references.
Add support for using references as range bounds. Note that this breaks backwards compatibility - because the range arguments are now more generic, additional hints are required to type literal numerics correctly. Typically this is most easily fixed by adding a call int for any numeric literals in ranges. An example is shown in example/Conway.hs

Introduce HuddleM, another way to define a Huddle spec. This allows total control over the order that items are presented in the CDDL, at the cost of making it somewhat harder to re-use items (they need to be returned from the monad).

collectFrom now adds a first definition in the generated Huddle referencing the top level elements, to be compatible with the CDDL spec.

Improvements in the pretty printer - various groups should be formatted more cleanly

Rationalise the choice operators. Drop (//) and provide detailed comments explaining the use of (/).