Removed query from startup of logger.  Depend on stream only.
Ignore one character tokens
Simplified NthLastModifiedTimeTracker, Rankings, SlidingWindowCounter, RollingCountBolt.
Changed SlotBasedCounter to retain zero counts for a full window time period to allow the rankings to be updated.
Inlined the Rankings interface.
Fixed Rankable to do proper comparison compatible with equals.  This allows Rankings to use a SortedSet and thus be massively simplified.
Extended time window.
Added logging every 1000 tweets
Make RankableCount that implements Rankable.  Make Rankings respect limited size.
Weaken return type, use synchronized set.
Avoid possible aliasing.
Shortened diagnostic output
Shortened diagnostic output
Trying to kill concurrent mod exception
Better toString for RankableCount
Softened equality for RankableCount
Get rid of two layer ranking
Added tests for Rankings and SlidingWindows.
Make window size a config parameter
merging Ted's changes