* add transform-class-properties to stage 3, set spec mode to default
* update readme with examples; use `buildUndefinedNode()`; change behavior to always define both static and nonstatic class properties regardless of spec/loose mode; update tests
* Add new.target transform
* Catch new.target under only an arrow function
* More unsupported reflect.construct cases
* Fix node 4 test
* Do not transform Methods
* More tests
* Properly setup function inheritance test
* Tests tests tests
* Fix ES6 class's new.target
* Remove expected output thats supposed to throw.
