* Streamline what we get from "otto/parser"
* Get rid of some "otto/parser" cruft
* FunctionExpression => FunctionLiteral
* The debugger statement (debugger) should do nothing (not panic)
* Fix aspects of function expression call evaluation
* The "reflect" package is willing to expose unexported fields in structs (a little suprising).
* Skip unexported fields when enumerating or trying to access (pretend they don't exist).
* Allow structs that implement json.Marshaler to work as expected in a JSON.stringify call.
If we let the runtime try to access unexported fields, it'll cause a panic.
This fixes#64
* Faster, more straightforward, etc.
* More advanced object literals (get ..., set ...)
* More tests using JavaScript from the wild (http://cdnjs.com/)
