Fix SES/Boto mailer
Fix SES/Boto mailer

This changeset fixes the custom e-mail backend we're using to send e-mail from Django through AWS SES.

azavea/nyc-trees,RickMohr/nyc-trees,kdeloach/nyc-trees,RickMohr/nyc-trees,maurizi/nyc-trees,maurizi/nyc-trees,azavea/nyc-trees,kdeloach/nyc-trees,RickMohr/nyc-trees,RickMohr/nyc-trees,azavea/nyc-trees,kdeloach/nyc-trees,kdeloach/nyc-trees,azavea/nyc-trees,maurizi/nyc-trees,kdeloach/nyc-trees,azavea/nyc-trees,maurizi/nyc-trees