Generate changelog for v1.6.6
Generate changelog for v1.6.6

GSadee/Sylius,Sylius/Sylius,pamil/Sylius,loic425/Sylius,foobarflies/Sylius,Sylius/Sylius,antonioperic/Sylius,mbabker/Sylius,pjedrzejewski/Sylius,Arminek/Sylius,diimpp/Sylius,Arminek/Sylius,foobarflies/Sylius,GSadee/Sylius,diimpp/Sylius,SyliusBot/Sylius,SyliusBot/Sylius,mbabker/Sylius,pamil/Sylius,101medialab/Sylius,Zales0123/Sylius,pjedrzejewski/Sylius,Zales0123/Sylius,101medialab/Sylius,pjedrzejewski/Sylius,foobarflies/Sylius,antonioperic/Sylius,kayue/Sylius,loic425/Sylius,mbabker/Sylius,antonioperic/Sylius,kayue/Sylius,pjedrzejewski/Sylius,SyliusBot/Sylius,Arminek/Sylius,lchrusciel/Sylius,lchrusciel/Sylius,Zales0123/Sylius,Sylius/Sylius,pamil/Sylius,mbabker/Sylius,kayue/Sylius,loic425/Sylius,diimpp/Sylius,lchrusciel/Sylius,foobarflies/Sylius,GSadee/Sylius,101medialab/Sylius