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/particlesystem.cpp

@@ -84,7 +84,7 @@ void ParticleSystem::update()
         return;
     m_lastUpdateTime = g_clock.seconds() - std::fmod(elapsedTime, delay);
 
-    auto self = self_cast<ParticleSystem>();
+    auto self = static_self_cast<ParticleSystem>();
     for(int i = 0; i < elapsedTime / delay; ++i) {
 
         // update emitters