Carthage support: made umbrella header to be public
Carthage support: made umbrella header to be public

goodeggs/Classy,ClassyKit/Classy,dnedrow/Classy,goodeggs/Classy,sudeepsidhu/Classy,1yvT0s/Classy,cloudkite/Classy,sudeepsidhu/Classy,dnedrow/Classy,Snupps/Classy,1yvT0s/Classy,Snupps/Classy,wearezeta/Classy,mwkirk/Classy,TippingCanoe/Classy,cloudkite/Classy,fuzhiqiang1989/Classy,keithnorm/Classy,dnedrow/Classy,keithnorm/Classy,fuzhiqiang1989/Classy,mwkirk/Classy,TippingCanoe/Classy,wearezeta/Classy,ClassyKit/Classy