Rename the following QT related IGT classes according to the MITK style guide.
OpenIGTLinkManager -> QmitkOpenIGTLinkManager
UltrasoundCalibration -> QmitkUltrasoundCalibration
IGTFiducialRegistration -> QmitkIGTFiducialRegistration
IGTNavigationToolCalibration -> QmitkIGTNavigationToolCalibration
UltrasoundSupport -> QmitkUltrasoundSupport