COMP: integrated in SuperElastix with initial google tests

Modules/Core/ComponentInterface/include/ComponentBase.h

...les/Core/ComponentInterface/include/Example3rdPartyCode.h

...les/Core/ComponentInterface/include/Example4thPartyCode.h

...ComponentInterface/include/GDOptimizer3rdPartyComponent.h

...ComponentInterface/include/GDOptimizer4thPartyComponent.h

Modules/Core/ComponentInterface/include/Interfaces.hxx

...s/Core/ComponentInterface/include/Metric3rdPartyWrapper.h

...s/Core/ComponentInterface/include/Metric4thPartyWrapper.h

...e/ComponentInterface/include/SSDMetric3rdPartyComponent.h

...e/ComponentInterface/include/SSDMetric4thPartyComponent.h

Modules/Core/ComponentInterface/src/Example3rdPartyCode.cxx

Modules/Core/ComponentInterface/src/Example4thPartyCode.cxx

...e/ComponentInterface/src/GDOptimizer3rdPartyComponent.cxx

...e/ComponentInterface/src/GDOptimizer4thPartyComponent.cxx

...les/Core/ComponentInterface/src/Metric3rdPartyWrapper.cxx

...les/Core/ComponentInterface/src/Metric4thPartyWrapper.cxx

...ore/ComponentInterface/src/SSDMetric3rdPartyComponent.cxx

...ore/ComponentInterface/src/SSDMetric4thPartyComponent.cxx

Modules/Core/ComponentInterface/src/componenthandshake.cxx

Modules/Core/elxModuleCore.cmake