Defer font tracking css script until after initial page load

earlier today i saw the page load being blocked on retrieving
hello.myfonts.net and it made me mad enough to make this commit

Gemfile

@@ -32,9 +32,6 @@ group :assets do
   gem 'handlebars_assets'
   gem 'jquery-datatables-rails'
   gem 'sass-rails'
-  # sass_rails_patch allows 'css.scss.erb' to work.
-  # delete this when upgrading to rails 4 (sass-rails 4.0.0 incorporates a similar fix)
-  gem 'sass_rails_patch'
   gem 'compass-rails'
   gem 'coffee-rails'
   gem 'uglifier'

Gemfile.lock

@@ -287,8 +287,6 @@ GEM
       railties (~> 3.2.0)
       sass (>= 3.1.10)
       tilt (~> 1.3)
-    sass_rails_patch (0.0.2)
-      sass-rails
     select2-rails (3.5.2)
       thor (~> 0.14)
     sentry-raven (0.7.1)
@@ -383,7 +381,6 @@ DEPENDENCIES
   rspec-rails
   sanitize
   sass-rails
-  sass_rails_patch
   select2-rails
   sentry-raven
   sextant

app/assets/javascripts/font_analytics.js.erb

@@ -0,0 +1,9 @@
+<% if Rails.env.production? %>
+$(document).ready(function () {
+  var fontTracking = document.createElement('link');
+  fontTracking.type = 'text/css';
+  fontTracking.rel = 'stylesheet';
+  fontTracking.href = '//hello.myfonts.net/count/262127';
+  document.getElementsByTagName('head')[0].appendChild(fontTracking);
+});
+<% end %>

app/assets/stylesheets/_fonts.css.scss.erb → app/assets/stylesheets/_fonts.css.scss

@@ -1,8 +1,3 @@
-<% if Rails.env.production? %>
-  /* font analytics for licensing */
-  @import url("//hello.myfonts.net/count/262127");
-<% end %>
-
 @font-face {
   font-family: 'Freehand521BT-RegularC';
   src: url('/assets/freehand.eot');