title: Run script after windows store app has been installed
body: <p>Is there any way to run some activity after a Windows Store app has been installed?</p>
  
  <p>I'd like to get some data from a webservice (data is rarely changes), but I would not like to make the query on the first start, because it might take some time, and I don't want to ruin the user experience.</p>
  
  <p>Thanks!</p>