* Fixed color key feature. The surface pitch should be used. fixes #812
 * Added monochrome rendering support. fixes #813
 * Changed instance act() to actOnce() and actRepeat(). Attention clients, API change! fixes #815
 * Added onInstanceActionCancelled() as callback function to the InstanceActionListener. Attention clients, API change. fixes #816
 * Added speed functions to the object and instance class. This value is used as cell speed multiplier. It does pretty much the same as one would call the setSpeedMultiplier() function from CellCache. So if the object have a speed modifier, then this value is set to every cell where its instances are placed. fixes #814