Api work for #205

Refactored how we check if the user has a valid api key
Added POST request, PUT and DELTE

Also some work on the updater #29

PlexRequests.UI/Start/StartupOptions.cs

@@ -57,7 +57,7 @@ namespace PlexRequests.UI.Start
         ///   <c>true</c> if updated; otherwise, <c>false</c>.
         /// </value>
         [Option('u', "updated", Required = false, HelpText = "This should only be used by the internal application")]
-        public bool Updated { get; set; }
+        public UpdateValue Updated { get; set; }
 
     }
 }