Merge pull request #16 from CatoTH/master

Support for Facebook's Real-Time Updates
CatoTH - you might wish to consider moving delete_url to include/network.php, but since that is in a separate repository best to wrap it in "if (! function_exists('delete_url')) ..." in case somebody git updates the addon at a different time than the main code.

diff --combined facebook/README
index 9e381e7dca9e151fefec783e31fa052895ce08ca,e2a3c838777418d40d4ef3e4a34c90ffdc078e7f..9687558e70bd9a0d1b8aefd167e4aea1a8f64402
--- 1/facebook/README
--- 2/facebook/README
+++ b/facebook/README
@@@ -17,15 -17,16 +17,18 @@@ Installing the Friendica/Facebook conne
       Replace with the settings Facebook gives you.
    d. Navigate to Set Web->Site URL & Domain -> Website Settings.  Set Site URL 
       to yoursubdomain.yourdomain.com.  Set Site Domain to your yourdomain.com.
 +  e. Chose "Website" (the url should be your site URL with a trailing slash) in the
 +     "Select how your app integrates with Facebook" section.
  2. Enable the facebook plugin by including it in .htconfig.php - e.g. 
      $a->config['system']['addon'] = 'plugin1,plugin2,facebook';
  3. Visit the Facebook Settings section of the "Settings->Plugin Settings" page.
     and click 'Install Facebook Connector'.
  4. This will ask you to login to Facebook and grant permission to the 
     plugin to do its stuff. Allow it to do so. 
- 5. You're done. To turn it off visit the Plugin Settings page again and
+ 5. Optional step: If you want to use Facebook Real Time Updates (so new messages
+    and new contacts are added ~1min after they are postet / added on FB), go to
+    Settings -> plugins -> facebook and press the "Activate Real-Time Updates"-button.
+ 6. You're done. To turn it off visit the Plugin Settings page again and
     'Remove Facebook posting'.
  
  Vidoes and embeds will not be posted if there is no other content. Links