Prevent subject override with default_i18n_subject
Merge pull request #5 from Thinkei/defect/prevent-default-subject-override

Prevent subject override with default_i18n_subject
subject is not automatically set so it's possible to do so via postageapp.com template
Bump to 1.0.22
Acknowledge interceptors and perform_deliveries flag
Add README interceptor example as it has slightly different syntax
Apply same changes to rails4
Merge pull request #1 from Thinkei/defect/support-mail-interceptors

Support mail interceptors