Merge pull request #1 from enricopulatzo/master

Update
cleanHistoryOnStart and more LoggerLevels

http://logback.qos.ch/manual/appenders.html#tbrpCleanHistoryOnStart

http://logback.qos.ch/manual/configuration.html#loggerElement
add simple example to readme
Merge pull request #2 from Crydust/master

Merge crydust fork
Merge pull request #7 from nickcaballero/master

Merge from Crydust fork