Refactor the KeyOutWriter and DailyKeyOutWriter to create a slf4j logger.
Remove duplicate code from DailyKeyOutWriter.
Add the ability to create a Logback based out writer with size and time based rolling and with no filename on rollover.
Update slf4j to the version used by Logback.
Replace single of leading spaces with tab
Change line ending back to Unix style
Merge pull request #130 from turf00/master

Add support for logging output using Logback
Merge the logback and jexl updates to build.xml.