This PR ensures that all component rebalancing operations are resolved from a single location, after the update stage but before the render stage (thus, components may get reordered during the update, and these changes will go into effect during the rendering step on the same game tick).
This also fixes the problem where the child changing the priorities of its parent would cause a ConcurrentModificationError.
A number of methods that were used to handle rebalancing are now marked as deprecated. From the user's perspective, the only API they should be using is the .priority setter.
* Animations, CameraAndViewport, CollisionDetection and Components unified
* Added descriptions to effects
* Rename input games
* Unify input stories
* Add info to parallax section
* Added descriptions to the rendering examples
* Add descriptions to the sprites directory
* Fix utils and rendering section
* Add descriptions to the widgets section
* Delete directory that rebase brought back
* Unify game names
* Added some styleguide docs for examples
* Fix analyze issues
* All files should have _example as suffix
* Made the FollowComponentExample a bit easier to understand
* Change priority of ember
