Implementing a generic group manager. Deprecating the old string based group manager. Fixes #17.
Un deprecating group manager. Making GenericGroupManager abstract. #17.
Renaming Aspect to Filter for better code readablity. Keeping deprecated Aspect around for posterity. Fixes #8.
Adding pooling and unit tests to PlayerManager and TeamManager. Fixes #16.
Deprecated TagManager as it's a badly named class. Instead SingletonEntityManager should be used. Added Unit tests appropriately. Fixes #24.
Added SkipEntityProcessingSystem to replace DelayedEntityProcessingSystem. Added ExpirationSystem as a concrete implementation of SkipEntityProcessingSystem. Fixes #9.