Add new cmake variables to enable further customizations of the MITK Workbench:
- MITK_CUSTOM_PRODUCT_NAME (reaplces "MITK Workbench" if set
- Enable exclusion of certain vies and perspectives in the MITK app toolbars (new cmake options MITK_APPS_VIEWEXCLUDELIST, MITK_APPS_PERSPECTIVEEXCLUDELIST)
- enable/disable show view/perspective toolbars in the MITK app (new cake options MITK_APPS_SHOWVIEWTOOLBAR/MITK_APPS_SHOWPERSPECTIVETOOLBAR)
All three customizations use the existing mechanism in QmitkExtWorkbenchWindowAdvisor.cpp