Updated Xlsx Code and added Database Schema

*Updated xlsx code to use mysqlInsert routine
*Updated conf.py template to reflect reader/writer accounts for remote database
*Updated mysqlInsert to insert into correct database table name
*Added database schema file.  Use MySQL Workbench to open, modify and synchronize with remote database.

I tested writing xlsx file data to the remote database and it works.  You can use the MySQL Workbench to connect to the GEF database and delete data for testing insertion.