Check support for filtering message levels & routing differently

[phillipjohnston]

Filtering message routing based on log level needs to be checked. I'd expect a user to implement that strategy manually, but need to verify that the appropriate hooks are there to enable that

[phillipjohnston]

To use more words here: the original client wanted the ability to be able to filter different log messages, and depending on the level, to output them to different channels. One thought was that "critical" error messages could go out over satellite radio + SD card, while lower priority messages can be logged to an SD card.

We just need to create an example strategy class that proves we can filter messages to different places depending on the log level.