Create New Model Extension Definition Wizard

Create a wizard that allows the user to create a new Model Extension Definition (MED). The wizard should be an extension of the "org.eclipse.ui.newWizards" extension point and should be located in the "org.teiid.designer.extension.ui" plugin. The information required by the wizard is name of the ".mxd" file, the workspace folder to put the ".mxd" file, the namespace prefix of the MED, and the namespace URI of the MED. If the namespace prefix or namespace URI is already registered in the ModelExtensionRegistry the UI should warn the user but not prevent them from creating the MED. When all required information is entered in the UI the wizard should open the MED Eclipse editor. The wizard should not register this new MED in the registry.