Improved shell documentation, fixes #280
Improved shell documentation, fixes #280

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