refactored: Complete logger subsystem to be more stable and reliable BUT much more important -> support PSR-3 Logger-Interface: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
added: Composer support to DoozR
Merge pull request #7 from clickalicious/task-6-add-composer-support

Task 6 add composer support (+ refactored the whole logging subsystem)