Kernel logging

[omazapa]

Implented logging in kernel to remove noise. It is needed to write the frontend in terminal without extra outputs.

[fperez]

Thanks Omar, this is looking much better. Can you make the other fix that Robert suggested? It' just a matter of moving the _logger from being a class attribute to a simple module-level global. Since logging is used by all objects in the module, there's no benefit in making it a private attribute of each object, it can just be a module-level global (and it can be named simply 'logger', without the underscore).

We're getting close to ready for merging, thanks for the good work!

[omazapa]

ok guys is done, I am ready to continue with the frontend. Thanks!!

[fperez]

This looks good to me. Robert, do you have any other comments on this one? You have much more experience than I do with proper patterns of using the logging model, so before approving the request for merge, a final check from you would be much appreciated.

[rkern]

Looks good to me.

[fperez]

Thanks, Robert, for the check.

With that, I'll go ahead and merge it now, Omar. Good work!

[fperez]

Merged! Note, Omar, that the actual merge (9d65bd5) had to resolve a few conflicts because of changes in the session api since you started working on this. But I figured we'd made you work enough on this one already, so I finished that work :)

So go ahead and continue using master, which has the final form of the merge with your earlier commits and the last one fixed up by me to resolve the conflicts.