Better logger

1. Throw exception for fatal/error log when debugging
2. Write to debug output for warn/debug/info log when debugging
3. part of #355

Wox.Core/Plugin/JsonRPCPlugin.cs

@@ -74,7 +74,7 @@ namespace Wox.Core.Plugin
                 }
                 catch (System.Exception e)
                 {
-                    Log.Error(e.Message);
+                    Log.Error(e);
                 }
             }
             return null;