Completed ALL Rating, Review, and Payment Functionality...

The files listed have been updated.  Logic is as follows: Pay contractor
first. Return customer to contractor page. Rate button now becomes
available. Rate Contractor. Reviews are averaged with current reviews or
new review entry is made. Return customer to Contractor page.  {End
Logic}.  I also added a database table called "Stars" to keep track of
each contractor's star rating.  Upon further research, the previous
algorithm we had discussed was not possible, hence this new table...