Only run TravisCI builds against go1.3 and tip.
Only run TravisCI builds against go1.3 and tip.

strukturag/spreed-webrtc,theurere/spreed-webrtc,strukturag/spreed-webrtc,theurere/spreed-webrtc,theurere/spreed-webrtc,theurere/spreed-webrtc,theurere/spreed-webrtc,strukturag/spreed-webrtc,strukturag/spreed-webrtc,strukturag/spreed-webrtc,strukturag/spreed-webrtc,theurere/spreed-webrtc