Improved NodeJS and Empythoned integration. Published NodeJS NPM package "python-js"

bug fixes and better debugging for common runtime errors like missing attributes now will throw AttributeError and print the python source that caused the runtime error.

AttributeError is now raised for missing attributes.

new direct calling for using external javascript libraries. the old wrapper bindings to external javascript libraries are now deprecated.

new release includes Tornado module for NodeJS.

new NodeJS integration