* Added annotations dummy data

* Added test file

* Weak maps instead of regular dict

* Added 14 API tests

* Fixed put tests

* Some written tests and some additional checks

* Merge tests

* Split & group tests

* Clear annotations tests

* Statistics tests

* Added frames meta

* Selection tests & bug fixes

* Tests for frame

* ObjectState tests, many fixed bugs

* Object state tests

* Renamed method FrameData.frame() => FrameData.data()