RS Asset: Easier way to manage data in database

This class can be used to provide an object oriented interface to access database table rows performing what is usually called object-relational mapping (ORM).

Props for Mr. Kremsa from Kremsa Design (www.bykd.com) for the idea of the first version of this class which is used in his mad CMS called RockStar.

It reads a mapping definitions array that describes how to access a given table to perform the basic CRUD operations on the table rows: create, read, update and delete. The class provides functions those execute operations.