Added missing file for pull request #128 (#129)
Added missing file for pull request #128 (#129)

* Added new features: define a state + modify annotation

- Define a state for the annotation's label
- Modify the annotation's label
- Modify the label's state

* Missing file required for previous commit

antingshen/BeaverDam,antingshen/BeaverDam,antingshen/BeaverDam,antingshen/BeaverDam