Drop usage of the room attribute for timers

stories/fen-snack.js

@@ -174,15 +174,15 @@ stories.push({
           },
           delay: 10000,
           loop: true,
-          room: "stomach",
           classes: [
-            "alive"
+            "alive",
+            "stomach"
           ]
         }, state);
       },
       exit: (room, state) => {
         stopLoop("loop/fen-stomach.ogg");
-        stopRoomTimers("stomach", state);
+        stopClassTimers("stomach", state);
       },
       hooks: [
 
@@ -279,15 +279,15 @@ stories.push({
           },
           delay: 10000,
           loop: true,
-          room: "intestines",
           classes: [
-            "alive"
+            "alive",
+            "intestines"
           ]
         }, state);
       },
       exit: (room, state) => {
         stopLoop("loop/fen-intestines.ogg");
-        stopRoomTimers("intestines", state);
+        stopClassTimers("intestines", state);
       },
       exits: {
         "up": {
@@ -385,9 +385,9 @@ stories.push({
                 },
                 delay: 1000,
                 loop: true,
-                room: "bowels",
                 classes: [
-                  "alive"
+                  "alive",
+                  "bowels"
                 ]
               }, state);
 
@@ -399,15 +399,15 @@ stories.push({
           },
           delay: 10000,
           loop: true,
-          room: "bowels",
           classes: [
-            "alive"
+            "alive",
+            "bowels"
           ]
         }, state);
       },
       exit: (room, state) => {
         stopLoop("loop/fen-bowels.ogg");
-        stopRoomTimers("bowels", state);
+        stopClassTimers("bowels", state);
       },
       exits: {
         "up": {