Add unreleased section to CHANGELOG post 0.4.0 release prep
Add unreleased section to CHANGELOG post 0.4.0 release prep

cquinn/ponyc,Perelandric/ponyc,cquinn/ponyc,mkfifo/ponyc,dipinhora/ponyc,jemc/ponyc,CausalityLtd/ponyc,boemmels/ponyc,CausalityLtd/ponyc,dipinhora/ponyc,mkfifo/ponyc,jupvfranco/ponyc,Perelandric/ponyc,Praetonus/ponyc,Perelandric/ponyc,CausalityLtd/ponyc,ponylang/ponyc,Theodus/ponyc,ponylang/ponyc,Perelandric/ponyc,boemmels/ponyc,ponylang/ponyc,Praetonus/ponyc,mkfifo/ponyc,boemmels/ponyc,malthe/ponyc,Theodus/ponyc,kulibali/ponyc,kulibali/ponyc,cquinn/ponyc,sgebbie/ponyc,Theodus/ponyc,dipinhora/ponyc,sgebbie/ponyc,mkfifo/ponyc,malthe/ponyc,Theodus/ponyc,jupvfranco/ponyc,boemmels/ponyc,jupvfranco/ponyc,jemc/ponyc,boemmels/ponyc,Praetonus/ponyc,jupvfranco/ponyc,malthe/ponyc,mkfifo/ponyc,jupvfranco/ponyc,kulibali/ponyc,sgebbie/ponyc,cquinn/ponyc,jemc/ponyc,Perelandric/ponyc,sgebbie/ponyc,kulibali/ponyc,malthe/ponyc,sgebbie/ponyc,Theodus/ponyc,Praetonus/ponyc