Begin upgrade to rails 3.
Adding additional rails 3 upgrade files.
Fix survey state migration.
re-create list_memberships table
update db queries to new AR API
add sextant gem in development
Root url and several url-related fixes
form_for requires = instead of -
leftover deprecated find calls
fix obsolete yield usage

it used to return nil when no fragment was found, but now it returns the
empty string.

see
http://railscasts.com/episodes/227-upgrading-to-rails-3-part-3?view=asciicast
Merge pull request #23 from asymmetric/rails3

Fixes related to upgrading to rails 3.
fix user creation
fix user creation
move images
move relevant js files
remove dirs in /public
jquery.js provided by jquery-rails gem
remove app/stylesheets dir
use -url helpers to fix SASS urls
fix logo