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)

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)

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

This build fails because VectorContainer has a private default
constructor

Model the GoogleTest build after SimpleITK. This fixes previous build
errors.

ENH: ELASTIX-9 Only access connections via component indexes; BUG: ELASTIX-9 ComponentExist() did not work

The ENH: We deliberately avoid using connection indexes, but instead
force the user to think in terms of components which is conceptually
simpler and results in less pointers being thrown around while
constructing the blueprint.

The BUG: Temporarily disable functionality for deleting component until
we find a god way of asserting that vertex exist before it is accessed.

Revert "Revert "Merge branch 'ELASTIX-9-blueprints' of https://github.com/kaspermarstal/SuperElastix into ELASTIX-12-implement-componentdatabase""

This reverts commit 620dd446a6a6c01657e9d96aa12091ce23886966.

Revert "Merge branch 'ELASTIX-9-blueprints' of https://github.com/kaspermarstal/SuperElastix into ELASTIX-12-implement-componentdatabase"

This reverts commit 05e8e7605274f15923bd311b45a98be16686b18c, reversing
changes made to 86f7b5ebfc974553fc581004dc0abe203d69a703.

ObjectFactoryBase anymore