Reorganized core/ directory, it was too fatty already

-Removed FuncRef, since Callable makes it obsolete
-Removed int_types.h as its obsolete in c++11+
-Changed color names code

modules/websocket/remote_debugger_peer_websocket.cpp

@@ -30,7 +30,7 @@
 
 #include "remote_debugger_peer_websocket.h"
 
-#include "core/project_settings.h"
+#include "core/config/project_settings.h"
 
 Error RemoteDebuggerPeerWebSocket::connect_to_host(const String &p_uri) {
 	Vector<String> protocols;