Bug: fair_score requests with fairness disabled

[RaimiSol]

I have globally set:
$FAIRNESS_DISABLED = true

Using the chrome dev tools it can be shown that erroneous requests are made related to fair_score.js.

My estimated reason is:

1. In application.js:L29: //= require fair_score
2. In fair_score.js:L634 & L656 & L678: jQuery("#fairness_assessment").ready( ... ) and jQuery("#fair-home").ready( ... ) and jQuery('#fair-summary').ready( ... )

According to the jQuery documentation (.ready) jQuery("#fairness_assessment").ready is equivalent to $( document ).ready which leads to the unexpected behaviour.

[syphax-bouazzouni]

Fixed in #335