Merge branch 'master' into geta

stories/demo.js

@@ -63,7 +63,12 @@ stories.push({
           "execute": (room) => {
             state.player.rooms[room.id].squinted = true;
             print(["You stare at the wall and notice a secret door. But where is the key?"]);
-          }
+          },
+          "conditions": [
+            (room) => {
+              return !state.player.rooms[room.id].squinted;
+            }
+          ]
         },
         {
           "name": "Find Keys",

world.js

@@ -259,7 +259,10 @@ function updateRoom() {
       if (action.conditions) {
         if (!action.conditions.every(cond => cond(room))) {
           button.classList.add("disabled");
-          button.setAttribute("disabled", "true");
+          button.setAttribute("disabled", true);
+        } else {
+          button.classList.remove("disabled");
+          button.removeAttribute("disabled");
         }
       }