Refactor update dispatch.

Add ability to query version and api version.

Refactor into a CLI tool only.

Make META6.json updates more declarative with some meta magic.

Fix typo in test description.

Make break subcommand also increment api version.

Update api metadata to reflect current number of historical breaking changes.

Update well-formed/malformed tests with descriptions.

Reform type definitions to enable more fine-grained rejection of malformed version strings.

Add tests.

Make json output sort by keys.

Fix failure to parse abridged version strings with omitted patchset 0.

Change error case to return version for current date with patchset 0.

Refactor into chronver library.

Initial commit.