Issue 3455: Mail for abuse deleted works
Adding clarifying comments
Issue 3456: Co-author confused by deletion email
email overhaul: add  and reference mailer_helper
email overhaul: add images for new html emaill views
email overhaul: replace html email layout with summertea's design; add new plain text layout
email overhaul: change html email views to support new layout
email overhaul: add plain text email views
Merge pull request #1050 from tuff-ghost/issue_3274

3274: Plain text and HTML emails