Enable folders in visual studio

CMakeLists.txt

@@ -14,6 +14,10 @@ if (NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY AND WIN32)
 	set (CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/lib)
 endif ()
 
+if (CMAKE_GENERATOR MATCHES "Visual Studio")
+	set_property (GLOBAL PROPERTY USE_FOLDERS ON)
+endif ()
+
 option (ITA_CONVOLUTION_UPCONV_WITH_POWER_SAVER
 		"Use power saving mode for uniform partitioned convolution (do not convolve blocks with zeros)" ON
 )