changed the label on the image test tab's view in TTViewController's TTTabView
Changed The order of execution in animateRandomTracePatternsOfLength: method in TTTraceGridView so run loop transaction will be commited between drawing the last trace and the cleanup routine.  This will ensure that the array of selectedTiles will be updated before all it's entries are deleted AND give the layerDelegates a better shot at completing their drawRect methods before the pattern is removed.  The latter can never be 100% certain due to vagaries of timers and run loops but the former insures we will no longer run the risk of a crash by adding to selectedTiles AFTER all it's elements have been removed.  This would throw a "mutated while enumerating exception".