Removed all code concerning plugin subcollections. With the new helper and validation structure, this is no longer needed.
Moved the root URL to the Oframe module.
Database connection via PDO (MySQL) added. The database can be created by using the database service. Configuration is contained in the config file of the Oframe module.
Use the 'shareByDefault' in the plugin XML factory to determine if plugins should be shared.
Don't share validations by default.
While checking a validator for errors, the checking of individual fields was wrong. The field alias comparison was incorrect.