Do not display room if not reservable on the day

Stop displaying a line for a room in "additional tracks"
if it's actually not reservable at all during that day.

Change-Id: If7063b8bf00531cd154f49c3a3fbc88b1e16fa3f

html/ptg.html

@@ -109,6 +109,7 @@
       {{/each}}
       </tr></thead>
      {{#each @root.additional as |schedule room|}}
+     {{#if (roomactive schedule times)}}
      <tr><td>{{room}}</td>
       {{#each (lookup @root.slots day) as |time|}}
       {{#if (lookup schedule time.name)}}
@@ -118,6 +119,7 @@
       {{/if}}
       {{/each}}
      </tr>
+     {{/if}}
      {{/each}}
      </table>
     </div>

html/ptg.js

@@ -18,6 +18,15 @@ Handlebars.registerHelper('hashtag', function(options) {
   return new Handlebars.SafeString(sentence);
 });
 
+Handlebars.registerHelper('roomactive', function(schedule, times) {
+  for (var i=0; i<times.length; i++) {
+    if (schedule[times[i]['name']] != undefined) {
+      return true;
+    }
+  }
+  return false;
+});
+
 Handlebars.registerHelper('roomcode', function(schedule, room, timecode) {
   if (schedule[timecode] == "") {
     return room + "-" + timecode;