Remove console.log

I've been using this library, and it's working great.  Thanks!  One thing I'd like to do is stop it from logging messages to the console.

Most of the logging of this library can be prevented by doing the following:

```js
require('util')._logN = function() { }
```

_however_ there are still a few straggling calls directly to `console.log`.  This patch removes those calls.