Re-enabling travis.
Re-enabling travis.

See: http://blog.travis-ci.com/2015-05-26-xcode-63-beta-general-availability/

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