Update Notification Refactor (#511)

* Replaced profile links to anchors so we can open in new tab if we like

* Refactored how update checking works. We now explicitly check and send back on the same API. We have a weekly job that will push an update to the user.

* Implemented a changelog tab

* Ported over a GA fix for using ' in PR bodies.

* Don't check cert for Github

API/SignalR/PresenceHub.cs

@@ -6,6 +6,9 @@ using Microsoft.AspNetCore.SignalR;
 
 namespace API.SignalR
 {
+    /// <summary>
+    /// Keeps track of who is logged into the app
+    /// </summary>
     public class PresenceHub : Hub
     {
         private readonly IPresenceTracker _tracker;