title: piwik, how to get data per sub-domain?
body: <p>I have many sub-domains and I want to event data for each sub-domain.
  what I did is execute HTTP request like this, for each sub-domain:</p>
  
  <pre><code>/? 
  idSite=6&amp; 
  token_auth=out-outh-token&amp; 
  format=json&amp; 
  date=2014-10-13%2C2014-10-14&amp; 
  expanded=1&amp; 
  segment=eventCategory%3D%3Dgoals%3BpageUrl%3D%40some-sub-domain&amp; 
  method=Events.getCategory&amp; 
  module=API&amp; 
  period=range
  </code></pre>
  
  <p>which works fine for development, but as I execute many HTTP requests, they (the requests) start to time out.
  so I added waits every time it encountered a timeout, what made it slow...
  is there a way to get all this data in one request?
  is there a way to better handle this problem?</p>