1962 Diversity Links Insight.

Overview

The insight has a monthly and weekly version, each insight collects the links a user shared through their posts or tweets within the time frame and checks what is a user's most shared website.
If the over 50% condition is met the insight informs the user that 50% of their links went to one website.

The insight displays a breakdown of the last 50 , 100 or last weeks/months links (used if user hasn't shared over 50 links.)

Needed to create a new pull request due to local thinkup install messing up.

![screenshot from 2014-07-23 20 05 29](https://cloud.githubusercontent.com/assets/4369596/3680972/9e071912-12b4-11e4-88e0-464f378e4a73.png)