Add file logging and handle unhandled exceptions (#558)

* add unhandled exception handler

* added file logging

* add option in config

* consolidated console and file log

Ryujinx.Common/Logging/Logger.cs

@@ -16,6 +16,8 @@ namespace Ryujinx.Common.Logging
 
         public static event EventHandler<LogEventArgs> Updated;
 
+        public static bool EnableFileLog { get; set; }
+
         static Logger()
         {
             m_EnabledLevels  = new bool[Enum.GetNames(typeof(LogLevel)).Length];