* Added FlameAnimationController class
* Added MainAnimationController class
* Update doc comments
* formatting
* rename MainAnimationController
* Added tests for StandardAnimationController
* Added more tests
* comment
* Added changelog note
* Export StandardAnimationController
* formatting
* Use a default for 'curve' parameter
* rename onsetDelay -> startDelay
* Added Transofm2DEffect
* Added EffectComponent
* Added .transform getter
* formatting
* Rename EffectComponent -> Effect
* Add documentation for the Effect class
* minor
* Added a test for Effect class
* Adding tests for removeOnFinish
* Adding tests for onStart and onFinish
* Also check the effect after reset
* Fix-up merge
* formatting
* added doc-comments
* changelog note
* Added test for transform2DEffect
* Adjusted comments
* Make PositionComponent._transform public
* change changelog
* Added SimpleEffectController
* Added DestroyEffect
* Changelog note
* Rename DestroyEffect -> RemoveEffect
* Added example for RemoveEffect
* flutter format
* Move description of the RemoveEffectExample game
* move the description again
* minor
