Added known working security alternative to ssl => tls with port
different than default 25.
Removed includes. This will be kept only for
application.conf.example.for_dev which in development will have to be
renamed as application.conf to benefit from play default behaviour.
Removed SMTP section for securesocial_prod.conf. This section has been
moved to hyperbird_prod.conf for production single file configuration.
Added user section default in comments.
Refactoring configurations for single file configuration in production
mode and default application.conf configuration in developement mode.
Refactoring configurations for single file configuration in production
mode and default application.conf configuration in developement mode.
Removed includes section for development.
Rename hyperbird.conf for dev.
Securesocial configuration for dev contains smtp section.
In development it is convenient to include HyperBird and SecureSocial 
configurations directly in application.conf to benefit from default
config using: play run