add email sender and recipient templates
update email fields and use email templates
use admin recipient email
Merge branch 'hotfix/0.1.3'

* hotfix/0.1.3:
  use admin recipient email
  update email fields and use email templates
  add email sender and recipient templates
update email template names
Merge branch 'hotfix/0.1.4'

* hotfix/0.1.4:
  update email template names