//Swaps skin files and library info
void swap(Skin s1, Skin s2)
{
int s1slot = s1.modelslot;
int s2slot = s2.modelslot;
//Moving origin files to temp
s1.move(-1);
//moving destination to origin slot
s2.move(s1slot);
//Moving origin to destination slot
s1.move(s2slot);
//Swapping in library
Library.swap_skin(fullname, s1slot + 1, s2slot + 1);
}