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Implemented a real PropertyWidgetFactory where property widgets can register themselves together with the property type they wrap around. Registration is implemented using CRTP do allow automatic registration across DLL boundaries during static initialization time.
This commit replaces the long list of if-else in PropertyWidgetFactory with a much more generic approach.

* Moving to Apache 2.0 license
* Updated AUTHORS.txt

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@476 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@395 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@338 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@335 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@326 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * added update_legal_header.py script for updating the legal header in all code files of the project
 * ran the file => all TUMVis source files now contain the legal header

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@231 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 + added PropertyWidgetFactory
 + added AbstractPropertyWidget and StringPropertyWidget
 * replaced own observer implementation of AbstractPipeline and AbstractProperty with sigslot
 * changed PropertyCollection (aggregation) to HasPropertyCollection (inheritance)

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@207 bb408c1c-ae56-11e1-83d9-df6b3e0c105e