Fix bug in mimeType()
Fix bug in mimeType()

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