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Things like date-stamps, time-stamps, categories, and log levels are now
highlighted in every log message. This should make the contents of the
log viewer easier to scan by indicating which information is important.

VisualizationPipelineWidget and PipelineMdiSubwindow have been extended
to report changes in their positions to VisualizationPipelineWrapper.
Based on the information the latter receives, it decides when to undock
MDI subwindows and dock floating pipeline widgets.

As a result, it's now possible to drag visualization pipeline widgets
back into the MDI area and turn them into MDI subwindows.

The way visualization pipelines are displayed has been considerably
reworked. A new class, VisualizationPipelineWrapper, is now responsible
for creating all necessary representations (VisualizationPipelineWidget,
PipelineMdiSubwindow) of a visualization pipeline and seamlessly
switching between them in response to the user's actions (window
dragging, key presses, etc). As a result, it's now possible to drag
visualization pipeline widgets out of the MDI area and turn them into
top-level floating windows.

This initial .gitignore masks build by-products and project files of some
IDEs.

 * each VisualizationProcessor manages its own FBO
 * instead of creating a whole new FBO each process(), the processors shall only create and attach textures to the FBO
 * the FramebufferActivationGuard offers automatic (de)activation and detachment of all textures

SimpleRaycaster already uses the new concept, the rest still uses the legacy API

This reverts commit 240d7dab.

 * added debug output to DataContainerInspector

Conflicts:
	application/campvis.cpp
	modules/columbia/datastructures/fiberdata.cpp
	modules/columbia/datastructures/fiberdata.h
	modules/columbia/pipelines/columbia1.cpp
	modules/columbia/pipelines/columbia1.h
	modules/columbia/processors/strainfibertracker.cpp
	modules/columbia/processors/strainfibertracker.h

Revert "* fixes Issue #99"
This reverts commit 97fb9f3c.

If a DataNamePropertyWidget is created for a DataNameProperty whose
AccessInfo == READ, it doesn't instantiate a QLineEdit to display the
property's value (QComboBox is used instead).

Previously, the updateWidgetFromProperty method didn't check AccessInfo
to see what display widget was in use, and simply always dereferenced
the _lineEdit pointer. If AccessInfo == READ, it was null and the
application crashed.

Now updateWidgetFromProperty accesses only the combo box if
AccessInfo == READ, and uses the line edit otherwise.

Fixes #99