std.logger

String logging facilities for Phobos.

Docu:
http://burner.github.io/phobos/phobos-prerelease/std_logger_core.html
http://burner.github.io/phobos/phobos-prerelease/std_logger_filelogger.html
http://burner.github.io/phobos/phobos-prerelease/std_logger_multilogger.html
http://burner.github.io/phobos/phobos-prerelease/std_logger_nulllogger.html

dub
http://code.dlang.org/packages/logger
Don't sort on every insert, just insert at the right place:
```d
auto upper = logger[].assumeSorted!"a.name < b.name"().upperBound(MultiLoggerEntry(name, null));
logger.insertBefore(upper.release(), MultiLoggerEntry(name, newLogger));
```