IP Reg Upgrading

This version has still not reached version 1.0 (feature complete).
As such, there may be changes at any time.

There is no database upgrade logic so the database structure has
to be compared manually.

1. Check and upgrade database schema 
Compare current database schema with the contents of the database
creation script "mysql.sql".
Create missing objects in your current database.

2. Install new version 
Install the new application in a new location.
Copy the configuration file "config.php" to new installation.
Compare the configuration to the sample config.
There may be additional settings that you want to customize.

3. Switch to new version
Rename the old an new directory.

4. Done
If everything works fine you could remove the old directory.