Fix spacing on time spent
Correct duration so its assumed value is in ms (fixes GH-1019)
Merge branch 'master' into drf-api
Move resolve endpoint into group details PUT method
Break delete_project into smaller tasks
Add the ability to leave notes on groups
Re-add first seen event
Remove hash from redirect
Correct hover border color on add note button
Only render links in notes
Various activity additions

- Added email notifications for notes
- Corrected duplicate ident check for notes
- Refactored some standard email code into sentry.utils.email
Force unicode
Remove author from list of users
txt_body -> body
Switch send_invite_email to MessageBuilder
Convert send_recover_mail to MessageBuilder
Hide POST body on public links
Support headers on MessageBuilder
Correct usage of pynliner
Correct default headers