Integrate a new resource manager which should have better performance

src/sounds.hpp

@@ -10,11 +10,13 @@
 #define _SOUNDTOOL_H
 
 #include <SFML/Audio.hpp>
+#include <string>
 
 void init_snd_tool();
 bool sound_going(snd_num_t which_s);
 void play_sound(snd_num_t which, sf::Time delay = sf::Time());
 void one_sound(snd_num_t which);
+std::string sound_to_fname(snd_num_t snd_num);
 
 void clear_sound_memory();