restrict the synchronisation process
restrict the synchronisation process

fixes #94

Maroben/MoblerCards,Maroben/MoblerCards,phish108/MoblerCards,phish108/MoblerCards,Maroben/MoblerCards,phish108/MoblerCards,phish108/MoblerCards,Maroben/MoblerCards,Maroben/MoblerCards,phish108/MoblerCards