Create a single root logger, rather than a root logger configuration, to prevent sharing issues when file sinks are used.
Merge pull request #1 from nblumhardt/master

Create a single root logger, rather than a root logger configuration

That was how my code was first written, but when I rehearsed the presentation I noticed that it might be confusing for some. I tried to make it similar to the more traditional XML-config.
But, I entirely agree. This code should show a proper way to set up the configuration.