Fixing some references to controller/action that we used back when we were going...

Fixing some references to controller/action that we used back when we were going to have a controller module

* PrinterRootForm.php: Renamed BSPrinterRootForm->controller to be ->action and BSPrinterRootForm->action to be ->do
(BSPrinterRootForm::__construct): Changes to ivar assignment
(BSPrinterRootForm::paint): Changes for ivar names
* PrinterRootPage.php: ditto
(BSPrinterRootPage::redirect): Take a location instead of a controller/action pair; additionally, make changes for postvars
(BSPrinterRootPage::confirm): Rename parameters to match BSPrinterRootForm ivars