changelog: Prepare for release 0.5.0
changelog: Prepare for release 0.5.0

NetSys/quilt,quilt/quilt,NetSys/quilt,LuiseV/quilt,kelda/kelda,kelda/kelda,LuiseV/quilt,LuiseV/quilt,kelda/kelda,quilt/quilt,NetSys/quilt,NetSys/quilt,quilt/quilt,kelda/kelda,LuiseV/quilt,NetSys/quilt,quilt/quilt,LuiseV/quilt