add todo
updatetodo
Delete .DS_Store
update with junit last version
use property instead of  compiler declaration in maven pom
use assertJ instead of fest assert
update for assertj
Merge branch 'step6' of https://github.com/ibeauvais/PlayWithJava8 into step7
Merge branch 'step7' of https://github.com/ibeauvais/PlayWithJava8 into step7