Loggers are evil (2.0)

There was a conflation between an Omnibus debug message and a build debug message. This commit adds a new log level called "internal" that is more verbose than debug.

Info:

![screen shot 2014-08-22 at 5 22 14 pm](https://cloud.githubusercontent.com/assets/408570/4017675/75f44918-2a42-11e4-91a4-86727f44a101.png)

Debug:

![screen shot 2014-08-22 at 5 23 25 pm](https://cloud.githubusercontent.com/assets/408570/4017690/943f36a8-2a42-11e4-9f76-29b8902c09f9.png)

Internal:

![screen shot 2014-08-22 at 5 24 02 pm](https://cloud.githubusercontent.com/assets/408570/4017697/a7e4c128-2a42-11e4-92e4-68375feea970.png)

![screen shot 2014-08-22 at 5 24 19 pm](https://cloud.githubusercontent.com/assets/408570/4017699/b4fb4c56-2a42-11e4-853f-a3ba7e4b1339.png)

- Fixes #322 

/cc @opscode/release-engineers @seth