Added note to titleView/subtitleView properties explaining sizing behavior.
Added note to titleView/subtitleView properties explaining sizing behavior.

u10int/calloutview,dmiedema/calloutview,mapbox/SMCalloutView,Petvetbook/calloutview,nfarina/calloutview,Suninus/calloutview,XBeg9/calloutview,Aiwis/calloutview,dmiedema/calloutview,Aiwis/calloutview,mapbox/SMCalloutView,Suninus/calloutview,u10int/calloutview,XBeg9/calloutview,Petvetbook/calloutview,nfarina/calloutview