add copyright to origin author name: rickytan
implement delegate method (RTagCloudView:didTapOnTagOfIndex:) and add datasource method(RTagCloudView:tagFontOfIndex:), performance better.
show tapped label' tag
add fonts array in sample view controller
add new screen shot
change folder name，and will add pod spec file
fix bug: select tag by mistake, remember selectedLabel when touchbegan
update
use new screenshot
support arc, so make deployment_target 6.0
no use
Merge pull request #1 from jimneylee/master

add the implementation to the delegate's method (RTagCloudView:didTapOnTagOfIndex:) and pod spec file