Better instructions if SimplePie is not available

Author: hvorragend

src/modules/Feeds/bootstrap.php

@@ -13,5 +13,10 @@
  */
 
 if (!System::isInstalling() && !PluginUtil::isAvailable('systemplugin.simplepie')) {
-    throw new Exception(__('Fatal error: SimplePie system plugin is not available'));
+    throw new Exception(__('<strong>Fatal error: The required SimplePie system plugin is not available.</strong><br /><br />
+Zikula ships with the SimplePie plugin located in the docs/examples/plugins/ExampleSystemPlugin/SimplePie directory. It must be copied (or symlinked) from there and pasted into /plugins<br />
+The plugin must then be installed. This is done via the Extensions module. Click on the System Plugins menu item and install the SimplePie plugin.'));
 }
+
+
+