Mandrill code ready to go.
- Tab only shown for users who have the option enabled in their profile.
- Responds to hard_bounce webhook
- Email can only be sent once - after send, it includes details about the result
- Confirmation required when "send!" is pressed
Mailchimp code mostly verified. Should be useable at least.

- Will receive contacts from mail chimp list signups (via web hooks)
- will add/up/del contacts from mail chimp lists
- also fixed a bug in contacts filter code
moved server, https changes, fixes to allow running as engine, ffcrm_merge added, robots.txt changed, attendances now shown correctly in contact/show
moved mailchimp create/up/destroy code into an observer. corresponding changes to import code, moved subscription from rake task into import code.