Removes miklog.

After much thought, I have decided to do away with miklog altogether. miklog is
only useful to a developer working on the library really, not a user. Users
won't want the uncontrolled output, and a networking library shouldn't depend on
stdio anyway; that would break compability with some boards that only support a
subset of C.

Instead, a future commit will implement an error package. Users can use the
return values.