Revert "use all in lib, restrict to relay in app"

This reverts commit b268c7fdc55638ad164bcde13af6b971d04a6d40.
Revert "add iceTransports: relay, supported in chrome 39+"
Seems to be causing problems with chrome 40

This reverts commit 0bd6f34b0ff8e8eda5f4b490a899b4277b085c20.