named loggers in NLog

sample

	public static class LoggingFactory
	{
		static LoggingFactory()
		{
			var name = Assembly.GetEntryAssembly().GetName().Name;
			var fileTarget = new FileTarget{FileName = string.Format("${{basedir}}/{0}_${{logger}}.log", name),Layout = "${message}"};

			var fileRule = new LoggingRule("*", LogLevel.Debug, fileTarget);

			var config = new LoggingConfiguration();

			config.LoggingRules.Add(fileRule);

			config.AddTarget("file", fileTarget);
			LogManager.Configuration = config;
		}

		public static Logger BuildLogger(string location)
		{
			return LogManager.GetLogger(location);
		}
	}