PipelineRegistry and ProcessorRegistry are now part of campvis-core. Furthermore, moved all calls to PipelineRegistrar<>/SmartProcessorRegistrar<> to a separate cpp file for each module. This way all registrations are at one central location and including headers in external projects does not lead to double registration.

This commit also removes the obsolete columbia and manualsegmentation modules.

* fixed ITK module CMake file so that it no longer breaks NLOpt
* Introducing RegistrationSliceView processor rendering the slice of the moving image with respect to the fixed image for registration purposes.
* Overhauled NloptRegistration pipeline to the updated CAMPVis API. Now again, working like a charm.

Introducing free campvis::init() and campvis::deinit() functions that take care of initializing all cgt and campvis-core stuff properly and tearing everything down in the correct order again.

Renamed CampvisPainter to PipelinePainter. The PipelinePainter now directly belongs to the corresponding AbstractPipeline, which also owns the pointer and takes care of creating, (de-)initializing and destroying it.

Cleaned up CMake scripts and added correct export definitions so that now CAMPVis can easily imported into other CMake projects through FIND_PACKAGE(CAMPVis).

Upon destruction, sigslot signals now wait for the signal_manager's signal queue to be flushed. This avoids crashed due to the signal_manager processing dangling signals, which have been deleted while being in the queue.

Removed generation of obsolete gen_converterregistration.h file through CMake since converter registration now entirely relies on explicit template specialization.

Added virtual AbstractPipeline::paint(), which is called by CampvisPainter at the very end of rendering. This method can be used to render additional overlays directly in the pipeline.

* Removed obsolete XInitThreads() from main function, since this is handled by Qt when constructing CampvisApplication.

* Implemented the actual logic behind the automation mode property in TrackballCameraProvider
* Added mouse wheel zoom support to cgt::Trackball
* Renamed cgt::IHasCamera to cgt::AbstractCameraProxy

closes #642

Fixed module CMake files not setting ThisModShaderDirectories correctly in case of multiple directories.

See merge request !116

closes #640
refs #641

refs #641

Removed OpenGLGarbageCollector interface. All textures, buffers and FBOs are now deleted right away. This seems to improve the flickering issues, however they are still present.

refs #640
refs #641

See merge request !115

closes #382

refs #382

Fixed IndexedMeshGeometry::hasPickingInformation() returning wrong value and thus GeometryRenderer failing to render correctly on AMD GPUs.

refs #382

Apparently, glBindAttribLocation() does not work as planned with AMD GPUs. Therefore, all Shaders yielded black images. Replaced all attribute locations with hard-coded ones in the vertex shader and removed corresponding convenience function from cgt::Shader.

refs #382

Added onDataContainerDataAdded overload to AbstractPipeline to set pipeline dirty when the render target image has changed. Rendering of multiple canvases at the same time still broken though.

refs #641

Cuda cm rebased

See merge request !114

ConfidenceMapGenerator now supports alpha-beta filtering.

Raycasterupdate

please do check DRRRaycaster, after rabasing, it yields a white screen !!

See merge request !113

* Cleaned up unsused code
* Fixed cppcheck issues
* Fixed depth test issues during OrientationOverlay rendering (had glitches in combination with DRRRaycaster)

Fixed duplicate member in OptimizedRaycaster.

Conflicts:
	modules/vis/processors/volumerenderer.cpp