security warning fix for 2.0
security warning fix for 2.0

Fixes #39

Hates/spree_email_to_friend,Vakrim/spree_email_to_friend,Vakrim/spree_email_to_friend,spree-contrib/spree_email_to_friend,spree-contrib/spree_email_to_friend,Vakrim/spree_email_to_friend,spree-contrib/spree_email_to_friend