title: full calendar, events holidays and own events
body: <p>I want to mix my own events and retrieve from google calendars the holidays for a given country. I have my API key etc..
  I get my data from ajax calls, and build my events as </p>
  
  <pre><code>     my_events.push({title:name,
                  start: moment(date_begin),
                  end:moment(date_end)
            });
  </code></pre>
  
  <p>works perfectly. Now I want the holidays. In the demos of full calendar in github, i see the following code:</p>
  
  <pre><code>     googleCalendarApiKey: 'xxx',
       // US Holidays
       events: 'usa__en@holiday.calendar.google.com',
  </code></pre>
  
  <p>It works (with my own key of course). </p>
  
  <p>But now, I cannot understand how  see both my_events and the holidays.
  I tried my_events.push({'usa__en@holiday.calendar.google.com'})
  does not work.</p>
  
  <p>How do I do that ?</p>
  
  <p>Another question is, I am not in USA, i would like to get European countries holidays. Does anybody know if there is a similar address for france, italy etc ? I tried fr, fra__fr, it, ita__it etc but always got a "notFound"</p>
  
  <p>Thanks for any pointer and explanation</p>