Removed duplicat seed operation

Added Option for mailgun

Added new module on composer

first commit

build using rails_apps_composer 3.1.36

build using rails_apps_composer 3.1.35

build using rails_apps_composer 3.1.34

corrected build using rails_apps_composer 3.1.33

build using rails_apps_composer 3.1.33

build using rails_apps_composer 3.1.32

build using rails_apps_composer 3.1.31

build using rails_apps_composer 3.1.30

add 'config/secrets.yml' file for Rails 5.2 example applications

build using rails_apps_composer 3.1.29

build using rails_apps_composer 3.1.28