Stripped HTML tags from emails on events#show_email

This is for when Mail gem screws up and lets multipart emails through.
Fixed pulling of multipart emails

Current behavior is to pick the text part of the email; if none exists, take the HTML part and strip the tags. If there is also no HTML part, then we have a really messed up email, and we show an error telling the user to go to the webmail.
Merge branch 'master' into production