Blueprint::ParameterMapType

Unit tests failed because Ctest resets the testing environment whereas this is not the case when running elxCompomentFactory executable (or in Debug mode)

and cxx files

Test if Travis VMs stalls because they run out of memory

Cmake version 3.0.2 still doesn't support CMAKE_CXX_STANDARD 11

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