Add @hobarrera to AUTHORS
Add @hobarrera to AUTHORS

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