First pass at getting array prop setting working.
Fixed valueOf on number
Added Number.prototype.valueOf tests
Basic work on EeferenceError
Added props for ReferenceError.
Fixed statements incorrectly wrapping expression error completions in normal completions.
First attempt adding native errors into evaluation.
Added error operations, stackframe
Fixed debugger actions.
Fixed Function.prototype.call for non object types, hooked in correct error
Added object expand for output in debugger. Fixed new Object returning instances of object prototype instead of objects with object prototype as prototype.
Added tail continuations to computations as callstacks are getting too large. Fixed object browser for recursive structures.
Updated parse-ecma. Fixed object browser issue for values.
Updated paths for new parse-ecma