Fixed INSERT statements in xml2sql script.

The script now produces INSERT statements that will automatically bind additive to category additive properties to language.
Added bash script to export git Tag to tar.gz file.
Updated/Added data scripts.

Change: Moved db_schema.mwb MySQL Workbench file to data/
Add: db_schema.sql - Database structure creation script.
Add: db_app_data.sql - SQL script that contains initial data to be imported into the database.
Updated data scripts. Additive.last_update field now populated via Now()
Added database CREATE bash script.

This script will create the MySQL database structure. It can also import the initial data - additives, locales, categories if required.
To use the script you need to first have the database already created as well as user with CREATE,DROP,ALTER,SELECT,UPDATE,INSERT,DELETE privileges set to the database
schema. Everything else is done automatically.
Updated README and db_create script help.