Convert ForOfTransformer to depend on runtime.js

Drive-by: correct constructor args and test only use of error reporter,
in SuperTransformer

Review URL: https://github.com/google/traceur-compiler/pull/505

Closes #505.
Merge branch 'master' into for-of-transformer-runtime-js

Conflicts:
	bin/traceur.js
	src/codegeneration/ForOfTransformer.js