Don't reinvent the email address parsing wheel

Rails already depends on the mail gem, which conveniently provides this
functionality.
People accept nested attributes for groups
Add a person to a group when they are created

- Inline membership on the person form
Add another group from the person form
Remove membership of a group from the person form
Temporary fix for validation changes on membership
Javascript instead of coffeescript
Don't display asterisk for required surname label
Display membership fields in a grey panel
Remove a person from a group and return to the form
Display image above upload button in edit profile
Format create / update button text for person
Delete this 'profile' not 'record'
Remove parentheses from 'remove' link
Link to 'add a new group' from the person form
Display group name when editing a group
Editing people on the group form
Rename membership form object for clarity
Clean up the 'remove group' from person link
Streamline the inline forms