fix for 'showLevel' value not being used in Console transport (#557) and description of debugStdout usage for Console Transport (#556)

[VipSaran]

Although test cases cover the scenario and the tests pass:

$ npm test test/transports/console-test.js

> [email protected] test e:\Work\workspace_private\winston
> vows --spec test/transports/console-test.js


  ♢ winston/transports/console

  An instance of the Console Transport with showLevel on
    ✓ should have level prepended
  An instance of the Console Transport with showLevel off
    ✓ should not have level prepended

the open issue shows that this scenario fails in a "real world" test. Hence this fix.

[indexzero]

Awesome! Thanks @VipSaran