photograph experience gains often counted only prior to first move

More details in https://github.com/NetHack/NetHack/issues/1430

track photographed monsters using a distinct bit

also adds a pair of new context fields to track the total number of monsters seen up close,
and the total number of monsters photographed.

So, if somebody wants to add unique end-of-game disclosure statements for tourists that relate to
those, the groundwork should be there.

NOTE: This increments EDITLEVEL, so existing save and bones files will become outdated.

Fixes #1430

src/apply.c

@@ -68,7 +68,7 @@ do_blinding_ray(struct obj *obj)
     if (mtmp) {
         (void) flash_hits_mon(mtmp, obj);
         if (obj->otyp == EXPENSIVE_CAMERA)
-            see_monster_closeup(mtmp);
+            see_monster_closeup(mtmp, TRUE); /* TRUE for photo */
     }
     /* normally bhit() would do this but for FLASHED_LIGHT we want it
        to be deferred until after flash_hits_mon() */