CudaConfidenceMapsDemo pipeline now has the feature to collect
statistics about the computed frames. The statistics can be exported in
CSV format to the clipboard.

You can now use the F keys (F1 - F5) to change presets in
ConfidenceMapsDemo.

* ConfidenceMapsDemo pipeline can now interpret voxel size as fan
  geometry. This is actually a quick quirk. The fan geometry is encoded in
  (x, y, z) as (fan-angle, inner-radius, 1.0f)
* Added support for the current cusp version on git

* CMake has been improved and now supports for example module dependencies
  and works for visual studio compilations
* An image cropping stage has been added to the pipeline to trim any
  garbage that might show up at the border during image acquisition.
* Added support for 2D images to the GlImageCrop Processor

* Removed some dead code.
* Avoided one texture copy in the ConfidenceMapsSolver Processor
* Exposed one more option to the ConfidenceMapsDemo piepline

* Now it is possible to set a time budget for the CudaConfidenceMapsDemo
  pipeline and the number of CG iterations that can be carried out is
  automatically determined.
* Code still needs some cleanup.

Now the pipeline correctly uses the fused confidence image as input
for the fan geometry rendering.

* Added GlImageResampler processor to lower the resolution of the US image
* Exposed solver parameters to the GUI
* Added AdvancedUSVisualization processor to display the data

Code still needs to be cleaned up a lot, and settings need to be exposed
to the GUI.

Now it is possible to change the property window just by navigating
the PipelineTreeWidget with the arrow keys

refs #386

moved matrixprocessor to base module; removed obsolete positiondata.h and transformdata.h from openigtlink module; fixed include statements;

contains processing of IMAGE and TRANSFORM messages

* Moving to Apache 2.0 license
* Updated AUTHORS.txt

Work on Issue #44: Removed GLContext interface and merged functionality into GlCanvas. Introducing abstract (Qt-free) tgt::GlContextManager interface, being implemented by tgt::QtContextManager. Further clean up of related code.

Refactored DataNameProperty: Got rid of issueWrite() and connect(). Automatic invalidation of connected (shared) DataNameProperties is now delegated to AutoEvaluationPipeline.
ATTENTION: needs TBB 4.2 (not yet in repository, will be changed later)

Instead of having the LQ mode tied to the pipeline, each VisualizationProcessor has now a lqMode property effectively halfsampling the viewport size. The TrackballNavigationEventHandler was adapted to these changes and thus simplified.

work on #135: changed VisualizationProcessor::_renderTargetSize to pointer and introducing VisualizationProcessor::setViewportSizeProperty()

Revised event handling system: Got rid of campvis::AbstractEventHandler and replaced with functionality of tgt::EventListener and tgt::EventHandler

* fixed transfer function shader
* let processor unlock call after execution be handled by seperate thread

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@494 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@487 bb408c1c-ae56-11e1-83d9-df6b3e0c105e