added support for multiple connection in PDOCollector (fixed #5)
added support for multiple connection in PDOCollector (fixed #5)

DanPhyxius/php-debugbar,maximebf/php-debugbar,DanPhyxius/php-debugbar,reignHay/debugbar,stefandoorn/php-debugbar,getgrav/php-debugbar,stefandoorn/php-debugbar,reignHay/debugbar,stefandoorn/php-debugbar,Big-Shark/php-debugbar,stefandoorn/php-debugbar,snapshotpl/php-debugbar,maximebf/php-debugbar,getgrav/php-debugbar,DanPhyxius/php-debugbar,barryvdh/php-debugbar,getgrav/php-debugbar,barryvdh/php-debugbar,maximebf/php-debugbar,PatidarWeb/php-debugbar,reignHay/debugbar,reignHay/debugbar,Big-Shark/php-debugbar,DanPhyxius/php-debugbar,PatidarWeb/php-debugbar,barryvdh/php-debugbar,Big-Shark/php-debugbar,snapshotpl/php-debugbar,snapshotpl/php-debugbar,Big-Shark/php-debugbar,PatidarWeb/php-debugbar