Commented the database schema and made a few modifications based on the review today
Commented the database schema and made a few modifications based on the review today

sahana/vesuvius,bobrock/vesuvius,ramdesh/vesuvius_installer,sahana/vesuvius,ramdesh/vesuvius_installer,sahana/vesuvius,bobrock/vesuvius,bobrock/vesuvius,ramdesh/vesuvius_installer,ramdesh/vesuvius_installer,bobrock/vesuvius,sahana/vesuvius,bobrock/vesuvius,bobrock/vesuvius,sahana/vesuvius