Simple bunyan console logging stream

Logs bunyan message text to STDOUT. Output is directed to STDERR if a message's level ("fatal" (60), "error" (50), "warn" (40), "info" (30), "debug" (20), "trace" (10)) is greater or equals the value set by option stderrThreshold:

var bunyan = require('bunyan')
var consoleStream = require('bunyan-console-stream')
// ...

var stream_options = {
  stderrThreshold: 40 // log warning, error and fatal messages on STDERR
  displayStack: true // log error stack, if present
}

var logger = bunyan.createLogger({
  name: loggerName,
  streams: [
    {
      type: 'raw',
      stream: consoleStream.createStream(stream_options)
    },
    //...
  ]
})
// ...

logger.info('Success!');   // STDOUT output: INFO: Success!         			        
logger.error('Fail.');     // STDERR output: ERROR: Fail.