Remove public headers from umbrella header
Remove public headers from umbrella header

This seems to be the root cause for new projects created in Xcode 7.1
to report "Include of non-modular header inside framework Module
'Quick'".

Infer: It seems like the swift compiler in Xcode 7.1 now prevents
non-modular includes in umbrella header files. The public headers are
assumed to be imported in modules.

DanielAsher/Quick,marciok/Quick,paulyoung/Quick,DanielAsher/Quick,paulyoung/Quick,dgdosen/Quick,ikesyo/Quick,jasonchaffee/Quick,marciok/Quick,Quick/Quick,jasonchaffee/Quick,dgdosen/Quick,Quick/Quick,paulyoung/Quick,mokagio/Quick,ikesyo/Quick,dgdosen/Quick,jeffh/Quick,phatblat/Quick,jeffh/Quick,marciok/Quick,ikesyo/Quick,ashfurrow/Quick,ashfurrow/Quick,phatblat/Quick,phatblat/Quick,jasonchaffee/Quick,phatblat/Quick,mokagio/Quick,Quick/Quick,jeffh/Quick,Quick/Quick,mokagio/Quick