add timestamps to all log entries. closes #541

lib/logging.js

@@ -69,6 +69,7 @@ var filename = path.join(log_path, configuration.get('process_type') + ".log");
 
 exports.logger = new (winston.Logger)({
   transports: [new (winston.transports.File)({
+    timestamp: true,
     filename: filename,
     colorize: true,
     handleExceptions: true