Added OSX app to travis
Added OSX app to travis

hejunbinlan/SwiftGraphics,SheffieldKevin/SwiftGraphics,Pretz/SwiftGraphics,marinehero/SwiftGraphics,sdesimone/SwiftGraphics,slightair/SwiftGraphics,marinehero/SwiftGraphics,SheffieldKevin/SwiftGraphics,rhcad/SwiftGraphics,sdesimone/SwiftGraphics,marinehero/SwiftGraphics,hejunbinlan/SwiftGraphics,marinehero/SwiftGraphics,rhcad/SwiftGraphics,Pretz/SwiftGraphics,rhcad/SwiftGraphics,sdesimone/SwiftGraphics,slightair/SwiftGraphics,hejunbinlan/SwiftGraphics,sdesimone/SwiftGraphics,rhcad/SwiftGraphics,Pretz/SwiftGraphics,slightair/SwiftGraphics,SheffieldKevin/SwiftGraphics,hejunbinlan/SwiftGraphics,slightair/SwiftGraphics,Pretz/SwiftGraphics