[8Oct13 GCS] Started new branch for effects in progress.  Added test-data library to access JME particle textures.  Added particle effects and physical debris objects which appear when a Block is removed.  Added particle effect when explosive is removed.  Added code to GameBoard to remove particle emitters and debris after a certain time.

KNOWN ISSUES:
-Z-fighting occuring between particle emitters and board geometry
-Play hand button does not add particle emitters and debris to ArrayList of effects to be removed.  Effects generated from Blocks being removed by the play hand button last indefinitely.