Select all domains that can be notified

See #8
Small fix on README for this branch
Better performance (using indexes)

See #8
Begin building notification job
Retrieve domains to be notified is now asynch
Add language files that are going to be used by the REST server and by the
notification templates
Small refactory for better understandment
We should use string instead of numbers for language representation
Call gofmt after building the file
Add description about the script
Owner object can now have a language associated to it
Rename method
Rename method
Add missing test
Add owner to protocol layer
Fix integration tests for the new owner struct
Check language from REST languages file
Load notification templates
Add the first notification template
Portuguese template and tests