TODO: Test fails because of problems with setting up multiple instances
of xout in the same process

Also introduces the “SUPERELATIX_RUN_LONG_TESTS” option that disables
long running tests by default (e.g. 3D and 4D registration tests)

COMP: Add flags for Linux SuperBuild, move compiler-dependent settings to the same place in the build system

Merge branch 'ELASTIX-44-Unite-Interface-framework-with-Factory-framework' of https://github.com/kaspermarstal/SuperElastix into ELASTIX-44-Unite-Interface-framework-with-Factory-framework

Conflicts:
	Modules/Core/ModuleCore.cmake

TODO: fix VNL gcc flags and run tests

Conflicts:
	Modules/Core/ModuleCore.cmake

Merge branch 'ELASTIX-44-Unite-Interface-framework-with-Factory-framework' of https://github.com/kaspermarstal/SuperElastix into ELASTIX-44-Unite-Interface-framework-with-Factory-framework

Conflicts:
	Modules/Core/ComponentInterface/include/ComponentBase.h
	Modules/Core/ExampleComponents/src/GDOptimizer3rdPartyComponent.cxx
	Modules/Core/ExampleComponents/src/SSDMetric3rdPartyComponent.cxx

Interface related criteria can be handled in the MeetsCriteria in the
BaseComponent as well as the iterator over criteria, other (developer-user) specific Criteria are deligated to
MeetsCriterum per iteration.

Interface related criteria can be handled in the MeetsCriteria in the
BaseComponent as well as the iterator over criteria, other (developer-user) specific Criteria are deligated to
MeetsCriterum per iteration.

TFixedImage as the ImageSource template since the output image is
always resampled to the fixed image domain.

TODO: Fix 'error while setting up xout' error when running multiple
ElastixFilters in the same binary (see ELASTIX-56 in SuperElastix Jira)

All example components have the propertie ClassName as selection
criterium.

Moved ComponentSelector classes to ComponentInterface, moved Examples to
ComponentExamples. Made all Examples adhere to ITK factory functionality.

- Changed to namespace selx
- Combined componentbase classes and based it on itkLightObject
- Initial combination of example components
- Made templated ComponentFactory to replace all specific factories

Merge branch 'ELASTIX-43-Show-header-files-in-Visual-Studio' into ELASTIX-44-Unite-Interface-framework-with-Factory-framework

Adds a stand-alone ITK filter that wraps the elastix library
in a fully pipeline-compatible process object. The original
library interface was deprecated in favor of direct use of
elastix internals in the filter's GenerateData() for more
control over pipeline inputs and outputs.

TODO: Support multiple fixed and moving images
TODO: Return TransformParameters

WIP: Segmentation fault when trying to access result image