added new config parameter 'offset' to control framebuffer hack
build and register the USB host device and root hub
dded dummy implementation of VBoxUsbRegister, later this function will be used to register usb devices
 ignore MMIO deregister
construct USB host controller and root hub on startup
fix assertion faults in Timer used by the OHCI device, use synchonous timer lock befor using it
resize CPU session memory quota
added USB Mouse