Update changelog to reflect recent merges
Update changelog to reflect recent merges

thoughtbot/administrate,vgsantoniazzi/administrate,joshua5201/administrate,acrogenesis-lab/administrate,BenMorganIO/administrate,TheHumanEffort/administrate,TheHumanEffort/administrate,acrogenesis-lab/administrate,nando/administrate,thoughtbot/administrate,vgsantoniazzi/administrate,dminchev/administrate,tmecklem/administrate,tmecklem/administrate,dminchev/administrate,TheHumanEffort/administrate,kpheasey/administrate,BenMorganIO/administrate,acrogenesis-lab/administrate,tmecklem/administrate,kpheasey/administrate,thoughtbot/administrate,TheHumanEffort/administrate,kpheasey/administrate,BenMorganIO/administrate,dminchev/administrate,nando/administrate,joshua5201/administrate,BenMorganIO/administrate,joshua5201/administrate,thoughtbot/administrate,vgsantoniazzi/administrate,tmecklem/administrate,dminchev/administrate,joshua5201/administrate,acrogenesis-lab/administrate,vgsantoniazzi/administrate,nando/administrate,kpheasey/administrate,nando/administrate