google/traceur-compiler — pull request #1424 by johnjbarton (2014-10-16 03:14:10+00:00)
Title: Build directly out of node_modules/traceur.

We use the previous compiler from node_modules but
we were copying it into ./build based on old two-pass
self-hosting logic. Here we clean that up so we
have a better understanding of what we are really doing.