- Handlebars.VM is actually not part of the API, but Handlebars.VM.resolvePartial is mentioned in the documentation and is thus now treated as part of the API. Closes #1534
- Add support for custom helpers while keeping the list of builtin-helpers to maintain for autocompletion support closes #1544
- Move typings from lib/ to types/. - Add dtslint for validating types. - Use grunt-bg-shell to call out to dtslint during build step.