Message and Error Logger base classes

[ChristopherDavenport]

I've been considerring this and not sure if its a great use of time and resources, as most wouldn't utilize it but a message logger and a error logger split would allow a context logger to become a message logger given a context. So you can set context along the way or other tools to pass a specific context.

Wondering if others have thought as it puts another split in the hierarchy in a far more fundamental position.

[ChristopherDavenport]

Fixed by #48