Use the CMake folder tool to help IDEs groupt targets.

This is done as seen in http://athile.net/library/blog/?p=288

Hopefully this works in Visual Studio as KDevelop doesn't use this feature.

library/bindings/CMakeLists.txt

@@ -25,6 +25,7 @@ if(ENABLE_BINDINGS)
 		swig_add_module(PolyVoxCore python PolyVoxCore.i)
 		swig_link_libraries(PolyVoxCore ${PYTHON_LIBRARIES} PolyVoxCore)
 		#set_target_properties(${SWIG_MODULE_PolyVoxCore_REAL_NAME} PROPERTIES SUFFIX ".pyd")
+		SET_PROPERTY(TARGET ${SWIG_MODULE_PolyVoxCore_REAL_NAME} PROPERTY FOLDER "library/bindings")
 	else()
 		set(BUILD_BINDINGS OFF CACHE BOOL "Will the bindings be built" FORCE)
 	endif()