switched to logback (successor of log4j)
switched to logback (successor of log4j)
Merge branch 'master' of https://github.com/feffi/anwesenheit

Conflicts:
	anwesenheit-core/src/test/resources/logback.xml
	anwesenheit-web/src/test/resources/logback.xml
Merge branch 'master' of git://github.com/feffi/anwesenheit into feffi-master

Conflicts:
	anwesenheit-core/pom.xml