Automatically marking entity changed when a component is added or removed to an active entity. Changing the added/removed/changed... containers from arrays to sets, to make sure that entities don't get processed multiple times.
Merge pull request #5 from acatinon/master

Bug fix in DelayedEntityProcessingSystem
Update README.md
Mirroring the fix in artemis-odb: https://github.com/junkdog/artemis-odb/pull/42
Merge branch 'master' of ssh://github.com/apotapov/gdx-artemis
Fixing a bug in GroupManager. Had the boolean logic flipped.
Fixing a small bug in FastDeliveryEventSystem. Unit test added.
More bugs in fast delivery event system. Had to take a different double buffer approach to make sure the events don't get returned to the pool prematurely.
Adding a simple game demo.
Moving simple demo to a different package.
Removing the demo to move it to a separate project.
Updated Readme.
Updated Readme.
Updated Readme.
Adding a helper function to the world for creating events. Adding some javadoc.
Small unit test for issue #7.
Small readme update.
Readme update
Removing extra file.
[maven-release-plugin] prepare release gdx-artemis-0.3