jchubber/CareerVillage — Issue #19: Add referral dashboard to admin interface 
Author: jchubber
Created: 2011-12-10 01:04:47+00:00
State: open

As an administrator,
I want to be able to see statistics on how frequently referrals are being used,
So that I can decide whether the system is working or not and what I should do to make it better.

## Some stats that might live on the referral dashboard:
* Number of referral links generated in the last 1 month, 2 weeks, 1 week, 24 hours
* % of referral links sent during the last 1 month, 2 weeks, 1 week, 24 hours that were clicked on to date.
* % of referral links sent during the last 1 month, 2 weeks, 1 week, 24 hours that resulted in an answer to date.
* Top promoters: Top 20 users in terms of the number of referral links they generated in the last 2 weeks (rank + total #)
* Top outsourcers: Top 20 users in terms of the number of referred answers they gathered in the last 2 weeks (rank + total #)
* Top recruiters: Top 20 users in terms of the number of users who signed up after being referred by the user in the last 2 weeks (rank + total #)