Slightly correct the starting time (#101)

The previous start time was set as soon as the program discovered a running instance of Titanfall 2. However, this could lead to incorrect play times. Instead, the true start time is fetched from the process itself.

titanfall2-rp/ProcessNetApi.cs

@@ -34,7 +34,7 @@ public static bool Init()
             Log.Debug("Found '" + ProcessName + "'" + "!");
             var proc = processSearch[0];
             _sharp = new ProcessSharp(proc, MemoryType.Remote);
-            StartTimestamp = DateTimeOffset.Now.UtcDateTime;
+            StartTimestamp = _sharp.Native.StartTime.ToUniversalTime();
             return true;
         }