Add changelog for #173
Add changelog for #173

hobarrera/vdirsyncer,tribut/vdirsyncer,credativUK/vdirsyncer,untitaker/vdirsyncer,mathstuf/vdirsyncer,untitaker/vdirsyncer,tribut/vdirsyncer,hobarrera/vdirsyncer,untitaker/vdirsyncer,mathstuf/vdirsyncer,credativUK/vdirsyncer