Make package loading work for zip/jar files with missing directory entry.
Make package loading work for zip/jar files with missing directory entry.

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