Merge branch 'rs-remove-jquery-blockui' into 'master'

Remove jquery.blockUI.js plugin

It was required but no longer used.

See merge request !2273

app/assets/javascripts/application.js.coffee

@@ -13,7 +13,6 @@
 #= require jquery.waitforimages
 #= require jquery.atwho
 #= require jquery.scrollTo
-#= require jquery.blockUI
 #= require jquery.turbolinks
 #= require d3
 #= require cal-heatmap