TwP/logging — pull request #59 by ctucker (2013-03-15 00:54:45+00:00)
Title: Filtering mechanism similar to log4j or slf4j filters

Logging::Filter provides a base class for implementing arbitrary
event-based filtering of log events.

Logging::Filter::Level implements this to limit log messages to an
appender to only those that match a specific, enumerated list of log
levels.