Add BVH module in unsupported (patch from Ilya Baran)

(I thought I committed it a week ago but it seems the command failed)

unsupported/doc/examples/CMakeLists.txt

@@ -0,0 +1,17 @@
+FILE(GLOB examples_SRCS "*.cpp")
+
+ADD_CUSTOM_TARGET(unsupported_examples)
+
+FOREACH(example_src ${examples_SRCS})
+GET_FILENAME_COMPONENT(example ${example_src} NAME_WE)
+ADD_EXECUTABLE(${example} ${example_src})
+GET_TARGET_PROPERTY(example_executable
+                    ${example} LOCATION)
+ADD_CUSTOM_COMMAND(
+  TARGET ${example}
+  POST_BUILD
+  COMMAND ${example_executable}
+  ARGS >${CMAKE_CURRENT_BINARY_DIR}/${example}.out
+)
+ADD_DEPENDENCIES(unsupported_examples ${example})
+ENDFOREACH(example_src)