Convert some logging calls to exception raises
Convert some logging calls to exception raises

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