Improve error messages from getProtoParent.

Extend coverage to cover super prototype not an object.

Review URL: https://api.github.com/repos/google/traceur-compiler/issues/1158

Closes #1158.
Fix issue with Windows paths

Fixes #1146
Node API: add options parameter to require.makeDefault()
New instantiate binding system
Export updates are pushed through a binding function instead of
repeated lookups within an exports object, allowing for better
performance.