remove person.csv and replace with people.csv [address #191]
refactored group creation specs
Update nokogiri.
Use FileImage concern for Attachment model too.

Might fix #193
Add attendance totals report #1
Rewrite and improve test coverage for GroupsController.
Split up large GroupsController#index method.
Simplify member_of logic a bit.
Update remaining old-style finders [fixes #185]
Refresh the page when adding first group member [fixes #148]
Fix broken spec after change to Person#member_of? method.
Update Portuguese strings.
Update Romanian strings.
Make limited access a bit more useful.

If a user does not have `full_access` then they get a limited view of
the site. This change lets them have a little more by adding Directory
search functionality (with people names only), group and people
messaging, and ability to edit their privacy settings.
Fix bug showing email setting column to everyone.
Fix bug showing the 'Add Someone' box to everyone.
Add back code to throw errors on bad i18n key.
Add indicators when group is linked.
I18n the memberships index page.
Only create profile update when user changes core fields [fixes #184]