Created DBWrapper class
Created MySQLWrapper class
Changed reference to MySQLWrapper in init.php

Changed the reference to MySQLWrapper in init.php from being a
singleton to instantiating the object directly. This is to make it so
that the MySQLWrapper class doesn't need to know about the database
credentials constants but could rather just accept strings if that way
was preferred
Created Settings class

Created the Settings class. Adding and updating records implementation
is incomplete