Convert CodeLoader() to more closely follow ES6 Loader()

Isolate reporter and project in InternalCompiler.
Rename ModuleRequireVisitor -> ModuleSpecifierVisitor

Review URL: https://github.com/google/traceur-compiler/pull/540

Closes #540.
Add 'make self' and update self-compile.html

This separates bin/traceur.js from src/node/*:
 in working on module loading use self-compile.html
 to debug compilation, then make test to deal with src/node.

Review URL: https://github.com/google/traceur-compiler/pull/541

Closes #541.
Merge branch 'master' into module-node-js
Fix broken tests on Windows
Merge branch 'master' into module-node-js
Only add IIFE if needed