Add more test cases for Sluggable (strings with accents)
Add more test cases for Sluggable (strings with accents)

shieldo/DoctrineBehaviors,digitalkaoz/DoctrineBehaviors,MAXakaWIZARD/DoctrineBehaviors,bocharsky-bw/DoctrineBehaviors,MakG10/DoctrineBehaviors,lemoinem/DoctrineBehaviors,DerekRoth/DoctrineBehaviors,vba-ds/DoctrineBehaviors,ksom/DoctrineBehaviors,KnpLabs/DoctrineBehaviors