Fix nit.
Split js sourcemap into the separated file.
Split css sourcemap into the separated file.
Merge pull request #1 from saneyuki/separated-map

Split sourcemap into the separated file
update browserify
update vinyl-transdform.
Update power-assert & espowerify.
Merge pull request #2 from saneyuki/update

Update dependencies
Merge branch 'master' into react

* master:
  Update power-assert & espowerify.
  update vinyl-transdform.
  update browserify
  Split css sourcemap into the separated file.
  Split js sourcemap into the separated file.
  Fix nit.

Conflicts:
	package.json
Update React toolchain