FormatLogWriter should be merged into ConsoleLogWriter

[Google Code Exporter]

There is really no reason to have both of them, as one is essentially a 
superset of the other.  For now, FormatLogWriter isn't documented, and I'll 
keep it that way until it is merged.

Original issue reported on code.google.com by [e-mail] on 20 Jun 2010 at 8:01