MSVC compiles in Release Mode, pass build type through yaml-cpp

CMake/SuperBuild.cmake

 		PATCH_COMMAND ""
     	PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/yaml-cpp
     	CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} 
-                   -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} 
+                   -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
+                   -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} 
     	           -DYAML_CPP_BUILD_TESTS=OFF
                    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE} 
 		#INSTALL_COMMAND ""