Fixes #145, injectedScript is being preprocessed.
Add a var __qp_functionToString to each function body and set it to the
original source of the function. Override Function.prototype.toString() to
return the string. This way Function.prototype.toString() appears to return
original source, eg the injectedScript will not be preprocessed.
Add test case to StandaloneTest
Sync to upstream traceur compiler at a24aab5103f7829c8a4730d83bd49ed89c27b3f5
Add resource for testing iframes
Build traceur.syntax.SourceFile for each resource we pull up in the editor,
so we can support resources from iframes