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Replaced all occurrences of GL_POLYGON render mode with GL_TRIANGLE_FAN since GL_POLYGON is deprecated.

* Workflow stages now store the visibility of pipeline canvases
* Extended PipelineFactory to also hold creator functions to create workflows
* CampVisApplication now creates and initializes workflows when launched with "-w WorkflowName" parameter

refs #13

The WorkflowControllerWidget resides as new tab on the right-hand dock area of the main window and allows to interact with an AbstractWorkflow instance.

refs #13

Introducing virtual method AbstractData::getTypeAsString() to let every data type return a string representation of it's type to be shown in the GUI. Hence, we don't need the static if-then-else block in DataContainerTreeWidget anymore.

* Improved appearance of PipelineTreeWidget
* Fixed IntPropertyWidget and FloatPropertyWidget recursively setting the widgets value, when the change event comes from the widget itself

Now it is possible to create CAMPVis images with three dimensions but only a single slice (formerly automatically deduced as 2D image). Adapted/fixed some further code.

refs #613

* cleaned up cgt::Texture's constructors: only two left - to create an empty texture or a non-empty one
* cgt::Texture will no longer hold a copy of the image data in local memory
* removed a lot of redundant/confusing methods
* no longer needed to call uploadTexture() even though you don't want to upload sth.
* Adapted all known code to the new interface
* Removed cgt::TextureReaderDevil

refs #613

* Introducing DataSeries type (like ImageSeries but holding AbstractData, ImageSeries should be replaced some time)
* Fixed cgt::dmatX typedefs

phew! transfer function docking fixed. crashed once for some reason, couldn't recreate the condition

Fixes: saving color for simpletransferfunc, geometry1d..:addKeyPoint() added, ..editor::mousePressEvent updated, transfer..lua update to save all point and colors

transferfunc try v2

Conflicts:
	core/bindings/campvis.i

* Added automatic copy of inspect.lua to binary directory to CMake build scripts
* Added AbstractPipeline::getProcessor(std::string&)
* Added ScopedSynchronousGlJobExecution guard to Lua command execution to ensure having an OpenGL context present
* Fixed ordering in CampvisApplication::deinit()

* Removed CameraProperty, CameraPropertyWidget and TrackballNavigationEventListener
* replaces all known occurrences of the above three with the new TrackballCameraProvider processor
* introduced TrackballCameraProvider::reinitializeCamera()

refs #141

refs #386

refs #386

refs #386

Moved AbstractJob and OpenGLJobProcessor from campvis-core to tgt and adapted and cleaned up all necessary includes/references.

The new OpenGL wrapping API allows for full multi-threaded access to OpenGL contexts. Instead of one single thread scheduling all OpenGL jobs for all contexts, the new GlContextManager allows for OpenGL access from multiple threads while ensuring that each OpenGL context is acquired by only one thread at a time.

Detailed list of changes:
* tgt::GlContextManager keeping track of which threads acquire which OpenGL contexts and which threads currently have a context acquired.
* OpenGLJobProcessor does no longer schedules and execute the OpenGL calls for all existing contexts, but only for one single context that can be used for background tasks or other jobs that explicitly need a valid OpenGL context.
* AbstractPipeline now implements the Runnable interface and thus runs in it's own thread. This thread also owns the pipeline's OpenGL context.
* AbstractPipeline has a new pure virtual method executePipeline() that has to perform all computations done by the pipeline.
* AbstractPipeline now takes directly care of calling Painter::paint() of the pipeline's canvas (instead of signalling the Painter). However, the Painter interface needs further cleanup.
* AutoEvaluationPipeline was adapted to the new AbstractPipeline API, hence executing processors is no longer delegated to the OpenGLJobProcessor or the SimpleJobProcessor but entirely done in AutoEvaluationPipeline::executePipeline() and thus in the pipeline's thread.
* Adjusted CampVisApplication, DataContainerInspectorWidget, and GeometryTransferFunctionEditor to the new API.

* new QtJobProcessor singleton: used to execute jobs in the Qt thread
* CampvisApplication now has a map to obtain the window for a pipeline

* AbstractPipeline offers getter for the canvas to execute jobs in the pipeline's OpenGL context
* PropertyCollectionWidget adds a spacer element at the end to prevent element stretching when there is too much free space
* job.h offers new CallFunctionObjectJob to create jobs on the fly using lambda functions (the respective makeJob and makeJobOnHeap are inlined to prevent linker errors)

* Added OpenGL thread guard to image conversions to ImageRepresentationGL.

[merged commit]clean ups, fixes for g++ errors and warnings, and edits for cppcheck errors (except for the 480+ in the external library AlgLib)

Replaced DataContainer::s_dataAdded<const std::string&, DataHandle> with DataContainer::s_dataAdded<std::string, DataHandle>.

relocated mscopysegmentation module

relocated alglib library. Compiler warning level raised to w1 to get rid of float-double conversions.

save results into csv
akima spline interpolation using alglib, deleting nearest point

alglib library. extensive trimming required

ctrl+wheel zooming, arrow movement, ctrl+z, atl+click_nearest+click to edit _nearest point

multi object, multi location, multi slide contour point/line painting

draft code for addobject deleteobject

added ContourObject class linked with add and delete button.

added a proxy class of Vec4Property/Widget as colorproperty/widget to control drawing color

Conflicts:
	modules/vis/processors/sliceextractor.cpp

edited DevilImageReader to read multiple files having same name pattern: somePrefix_[number].[extension] given the 1st file name

Worked on DevilImageReader to load single 2d image for 3d rendering

exp_01 commit

* Slight changes to the API: renamed signal::trigger() to signal::triggerSignal() and signal::queue() to signal::queueSignal()
* Replaced all sigslot signal emits through operator() with emits through emitSignal() to enable debug feature.
* Fixed a possible race condition when deleting a GeometryTransferFunction and its editor window at the same time (as this will happen from different threads).

refs #384

* Fixed crash (due to nullptr) in DataContainerInspectorWidget if DevIL module not present.

refs #384