Fixed typos regarding the strategy for composite keys (xml mapping reference)
Fixed typos regarding the strategy for composite keys (xml mapping reference)

The strategy for composite primary keys must be "NONE" although the id generator class is \Doctrine\ORM\Id\AssignedGenerator. Calling the strategy "ASSIGNED" is misleading.
PowerKiKi/doctrine2,AdactiveSAS/doctrine2,Sitetheory/doctrine2,nicolas-grekas/doctrine2,deeky666/doctrine2,bigfoot90/doctrine2,yurybykov/doctrine2,holtkamp/doctrine2,Majkl578/doctrine2,Ocramius/doctrine2,lcobucci/doctrine2,Ocramius/doctrine2,guiwoda/doctrine2,gencer/doctrine2,gencer/doctrine2,tPl0ch/doctrine2,TomasVotruba/doctrine2,bigfoot90/doctrine2,mikeSimonson/doctrine2,tPl0ch/doctrine2,Majkl578/doctrine2,lcobucci/doctrine2,Sitetheory/doctrine2,doctrine/doctrine2,beanworks/doctrine2,PowerKiKi/doctrine2,localheinz/doctrine2,aivus/doctrine2,Ocramius/doctrine2,stof/doctrine2,stof/doctrine2,holtkamp/doctrine2,AdactiveSAS/doctrine2,mikeSimonson/doctrine2,deeky666/doctrine2,doctrine/doctrine2,nicolas-grekas/doctrine2,beanworks/doctrine2,guiwoda/doctrine2,aivus/doctrine2,TomasVotruba/doctrine2,localheinz/doctrine2,yurybykov/doctrine2