some fixes for Harlowe 3.3.0

v2.2.1

- Improved handling of parsing errors; HAL should now fail more gracefully when malformed track definitions are provided via `hal.tracks`.
- Fixes #26

Merge pull request #23 from ChapelR/v2-dev

v2.2.0

Merge pull request #17 from ChapelR/v2-dev

v2.1.0

update demo to v2

Merge pull request #16 from ChapelR/v2-dev

HAL v2.0.0

Merge pull request #15 from ChapelR/dev

v1.3.0

v1.2.0

added event handler methods

v1.1.2

- fixed issue w/ `options.controls.show`
- updated documentation

v1.1.1 patch

fixes a pretty nasty bug in the track#fadeTo() method