vampires now shapeshift [trunk only]

- can shift into fog clouds, vampire bats, and vampire lords into wolves
- after being "killed" in shifted form, they transform back rather than get
  destroyed, and you must take them on in vampire form to defeat them
- can deliberately shift into fog clouds to pass under closed doors

src/trap.c

@@ -472,7 +472,8 @@ int *fail_reason;
 	else mon->mundetected = FALSE;
 
 	if ((x == u.ux && y == u.uy) || cause == ANIMATE_SPELL) {
-	    const char *comes_to_life = nonliving(mon->data) ?
+	    const char *comes_to_life = (nonliving(mon->data) ||
+					 is_vampshifter(mon)) ?
 					"moves" : "comes to life"; 
 	    if (cause == ANIMATE_SPELL)
 	    	pline("%s %s!", upstart(statuename),