unique-ify FAQ id. Closes #687

website/templates/_help.html

@@ -18,8 +18,8 @@
           </div>
 
 <div class="accordion-group">
-            <div class="accordion-heading"><a data-toggle="collapse" data-parent="#accordion-faq" href="#faq-10" class="accordion-toggle collapsed">Can I use photos that aren’t hosted on Flickr?</a></div>
-            <div id="faq-10" style="height: 0px;" class="accordion-body collapse">
+            <div class="accordion-heading"><a data-toggle="collapse" data-parent="#accordion-faq" href="#faq-non-flickr-images" class="accordion-toggle collapsed">Can I use photos that aren’t hosted on Flickr?</a></div>
+            <div id="faq-non-flickr-images" style="height: 0px;" class="accordion-body collapse">
               <div class="accordion-inner">Yes, but the photos must be publically available online and the URL must end in .jpg, .png, or .gif. Some users have found that uploading images to Dropbox is an easy and convenient way to give them a URL that’s compatible with TimelineJS.</div>
             </div>
           </div>