Added version of RedisFrameAggregatorBolt. Now it submits frames to the StreamProducer where logos detected on previous frames are also drawn. The parameter should be specified in config.yaml by creating field "persistFrames" - number of frames on which detected logo should persist. Value of 0 yields default persistence (rectangle appears only on the current frame).

Also removed unnecassary field from StreamFrame.java "list". It was not used anywhere, you might want to update the old classes calling its constructor.