title: What are the definitions of each of the Lifecycle Events in Orchard's CMS?
body: <p>The documentation for content handlers in Orchard mentions <code>Lifecycle Events</code> (<a href="http://docs.orchardproject.net/Documentation/Understanding-content-handlers" rel="nofollow">http://docs.orchardproject.net/Documentation/Understanding-content-handlers</a>).</p>
  
  <p>Most events are self explanatory, but I was wondering if anybody can tell me the differences between <code>OnActivated</code>, <code>OnInitializing</code>, and <code>OnLoading</code>?</p>