Add default timezone & locale config
Add default timezone & locale config

config.i18n.enforce_available_locales = true should stop warnings in
logs.

Closes opengovernment/ops#128

mapineda/askthem,opengovernment/askthem,mapineda/askthem,opengovernment/askthem,opengovernment/askthem,mapineda/askthem,opengovernment/askthem,mapineda/askthem