tree ff18e0f579998b67f94beb1e9d9555e87a258889
parent 4c2e9fd8b6c88d9529f72808f9c5ac4db8ec732a
author Anton Astashov <anton.astashov@gmail.com> 1443653171 -0500
committer Anton Astashov <anton.astashov@gmail.com> 1443727609 -0500

Add Logger.detached factory

Sometimes you just don't need to add a logger, which will be a singleton
and part of the global loggers tree. So, just a logger, which will be
garbage collected, and its onRecord.listen won't subscribe to the root one.
Right now, there is theoretical possibility for that, but a constructor
for that is private.

Added Logger.detached factory, which is doing exactly this.