Max dimension

Adds maxDimension property to ColorTracker to allow for more specific and customizable tracking of objects. MaxDimension has a default size of 100px but it can be easily changed to track objects under a certain size that may be the same color as other objects. After intersecting rectangles have been merged, maxDimension will only return rectangles under a certain size. 
Maybe defaults maxDimension to Infinity for backwards compatibility?