added javadoc
Revert "added javadoc"

This reverts commit 9f11b88ac0a00822fb741b495ad97e36b6d4d193.
Merge branch 'WB-127-2'
startet acceptance test for unique isbn
other tests for unique ISBN
Merge branch 'master' of https://github.com/scrum-for-developers/2014-02-team-3.git
unique id book acceptance test added
Merge branch 'master' of https://github.com/scrum-for-developers/2014-02-team-3.git
added twitter style