Fix getUrl() and getRelativePath() in ZipRepository for rooted subrepositories.
Fix getUrl() and getRelativePath() in ZipRepository for rooted subrepositories.

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