Update CHANGELOG for v1.2.1 release
Update CHANGELOG for v1.2.1 release

Nubisproject/nubis-dpaste,Nubisproject/nubis-dpaste,limed/nubis-dpaste,gozer/nubis-dpaste,gozer/nubis-dpaste,tinnightcap/nubis-dpaste,limed/nubis-dpaste,tinnightcap/nubis-dpaste,gozer/nubis-dpaste