Rework stdext classes

Implement new classes:
* stdext::any => ligher replacement for boost::any
* stdext::packed_any => like any but optimized to use less memory
* stdext::shared_object => ligher replacement for std::shared_ptr
* stdext::shared_object_ptr => replacement for boost::intrusive_ptr
* stdext::fast_storage => for storing dynamic data
* stdext::packed_storage => same but with less memory
* stdext::packed_vector => std::vector with less memory

Compiling should be a little faster now because global boost including
is not needed anymore

src/framework/graphics/image.cpp

@@ -40,7 +40,7 @@ ImagePtr Image::load(const std::string& file)
     ImagePtr image;
     try {
         // currently only png images are supported
-        if(!boost::ends_with(file, ".png"))
+        if(!stdext::ends_with(file, ".png"))
             stdext::throw_exception("image file format no supported");
 
         // load image file data