* add function getExtraInfos() to BridgeAbstract
* replace call to $bridge->getName() and $bridge->getURI() by $bridge->getExtraInfos()
replace call to $bridge->getName() and $bridge->getURI() by $bridge->getExtraInfos() defined by default in BridgeAbstract.
So we could pass additionals ExtraInfos from custom bridges to custom formats.