Merge topic 'SIMPLEITK-410_UseOptionBUILD_EXAMPLES'

4df55813 Enable Examples in SimpleITK superbuild for testing
1686a706 Moving CXX example tests to CMakeLists
57739dcc Only adding language specific example if build examples is enabled
360b0503 converted language specific add test macros into functions
69bedc0e adding cmake option for building examples
Merge branch 'master' into next

Change-Id: Ifb63f78fea67007931b4edd014d9557d672a5e17