Make ModuleScope extend ImporterTopLevel and activate its importPackage/importClass properties.
Make ModuleScope extend ImporterTopLevel and activate its importPackage/importClass properties.

Fixes http://github.com/ringo/ringojs/issues#issue/35

oberhamsi/ringojs,ashwinrayaprolu1984/ringojs,ashwinrayaprolu1984/ringojs,Transcordia/ringojs,Transcordia/ringojs,ringo/ringojs,ringo/ringojs,Transcordia/ringojs,oberhamsi/ringojs,ashwinrayaprolu1984/ringojs,Transcordia/ringojs,ringo/ringojs,ashwinrayaprolu1984/ringojs,oberhamsi/ringojs,ringo/ringojs