moved some items from defined constants to properties to allow for easier customization when
caches subviews for reuse, added minimumWidth
reduced amount of times display is called when changing multiple properties at once
fix for re-using tag views
warnings cleanup
no longer calculating totalHeight, total height is equal to (bottom margin + y and height of last tag)
Switched to using sizeWithFont:forWidth:lineBreakMode: instead of sizeWithFont:constrainedToSize:lineBreakMode as we never want more than one line
Merge pull request #10 from barrettj/master

Additional Properties and Performance Optimizations