implements '/account/referred_members' page`
merge from 2046
Merge pull request #19 from aproxacs/cs-2050-port-my-challenges

Cs 2050 New Rails Site - Port My Challenges
changed to renamed helper
changes from 2047
Merge branch 'cs-2051-port-referred-members' of git://github.com/aproxacs/cs-website-cms into aproxacs-cs-2051-port-referred-members