New game function: "shuffle girls" (Patreon)

I've added a small but nice new function to the game. In case there are more than 3 girls present in the current location, you will get a new button that shows how many girls are present. 

If you click the button, the girls will be shuffled. So now you no longer have to leave the location and come back just to see if there are some other girls present as well.