Add ToDos for event handler methods

Refers to #36

ATxService/AutoTx.cs

@@ -525,6 +525,7 @@ namespace ATxService
         /// </summary>
         private void OnLoadBelowLimit(object sender, EventArgs e) {
             Log.Trace("Received a low-CPU-load event!");
+            // TODO: resume running transfers
         }
 
         /// <summary>
@@ -532,6 +533,7 @@ namespace ATxService
         /// </summary>
         private void OnLoadAboveLimit(object sender, EventArgs e) {
             Log.Trace("Received a high-CPU-load event!");
+            // TODO: pause / suspend running transfers
         }
 
         /// <summary>