Typescript types for HAL documents

This repository exports a set of typescript types for
HAL documents.

It exports the following interfaces:

1. HalLink, representing an individual HAL Link
2. HalResource, representing a single HAL document, with at least a
   _links property and optionally _embedded property and _templates properties.
3. LinkHints, an extension to links, as defined in draft-nottingham-link-hint.
4. HalFormsTemplate, A HAL Forms template object.
5. HalFormsProperty A single property from a HAL Form.