Add encoding header for ruby 1.9
Add encoding header for ruby 1.9

controlshift/premailer-rails,controlshift/premailer-rails,doorkeeper/premailer-rails,fphilipe/premailer-rails,uswitch/premailer-rails,uswitch/premailer-rails,fphilipe/premailer-rails,fphilipe/premailer-rails,controlshift/premailer-rails,doorkeeper/premailer-rails