remove vendor from gitignore
remove vendor from gitignore

morilog/sandbox,vihuvac/sandbox,JoshuaEstes/sonata-skeleton,gabrielalmeida/sonata-sandbox,tophsic/sandbox,sonata-project/sandbox,volodymyr-nakvasiuk/sandbox,davask/exim-cms,volodymyr-nakvasiuk/sandbox,OskarStark/sandbox,tworzenieweb/polcode-recruitment,nlzet/sandbox,4devs/sonata-sandbox,KonstantinBY/sonata-sandbox,JoshuaEstes/sonata-skeleton,cbastienbaron/sandbox,vihuvac/sandbox,morilog/sandbox,cbastienbaron/sandbox,OskarStark/sandbox,gabrielalmeida/sonata-sandbox,4devs/sonata-sandbox,tophsic/sandbox,davask/exim-cms,volodymyr-nakvasiuk/sandbox,OskarStark/sandbox,davask/exim-cms,rzproject/sandbox,marcosQuesada/Symfony2--Sonata-Full---FOSUserBundle,vihuvac/sandbox,KonstantinBY/sonata-sandbox,EmmanuelVella/sandbox,morilog/sandbox,vihuvac/sandbox,cbastienbaron/sandbox,KonstantinBY/sonata-sandbox,marcosQuesada/Symfony2--Sonata-Full---FOSUserBundle,gabrielalmeida/sonata-sandbox,Soullivaneuh/sonata-sandbox,zsamotsil/polcode_task,tophsic/sandbox,Soullivaneuh/sonata-sandbox,EmmanuelVella/sandbox,sonata-project/sandbox,Soullivaneuh/sonata-sandbox,volodymyr-nakvasiuk/sandbox,zsamotsil/polcode_task,morilog/sandbox,tophsic/sandbox,JoshuaEstes/sonata-skeleton,rzproject/sandbox,4devs/sonata-sandbox,KonstantinBY/sonata-sandbox,cbastienbaron/sandbox,4devs/sonata-sandbox,tworzenieweb/polcode-recruitment,nlzet/sandbox,sonata-project/sandbox,rzproject/sandbox,Soullivaneuh/sonata-sandbox,nlzet/sandbox,davask/exim-cms