Play::Config backend module
refactor cookbooks into backend and frontend

also, generate /data/config.yml - global, not-just-dancer config
refactor models code into /play/backend; email pumper
create /data/storage/email
sendmail.pl pumper logging and fixes
sendmail.pl: bugfixes/improvements
experimental Moo::Runnable role
run sendmail-pumper as ubic service
sendmail pumper uses Moo::Runnable::Looper
fix dancer tests - pumper api has changed
Merge branch 'email-queue'