Replace turbolink spinner with nprogress

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Gemfile

@@ -167,6 +167,7 @@ gem 'bootstrap-sass', '~> 3.0'
 gem "font-awesome-rails", '~> 3.2'
 gem "gemoji", "~> 1.3.0"
 gem "gon", '~> 5.0.0'
+gem 'nprogress-rails'
 group :development do
   gem "annotate", "~> 2.6.0.beta2"

Gemfile.lock

@@ -297,6 +297,7 @@ GEM
       net-ssh (>= 1.99.1)
     net-ssh (2.7.0)
     nokogiri (1.5.10)
+    nprogress-rails (0.1.2.3)
     oauth (0.4.7)
     oauth2 (0.8.1)
       faraday (~> 0.8)
@@ -621,6 +622,7 @@ DEPENDENCIES
   minitest (~> 4.7.0)
   modernizr (= 2.6.2)
   mysql2
+  nprogress-rails
   omniauth (~> 1.1.3)
   omniauth-github
   omniauth-google-oauth2

app/assets/javascripts/application.js

@@ -29,3 +29,5 @@
 //= require_tree .
 //= require d3
 //= require underscore
+//= require nprogress
+//= require nprogress-turbolinks

app/assets/javascripts/main.js.coffee

@@ -41,19 +41,11 @@ window.linkify = (str) ->
 window.simpleFormat = (str) ->
   linkify(sanitize(str).replace(/\n/g, '<br />'))
-window.startSpinner = ->
-  $('.turbolink-spinner').fadeIn()
-
-window.stopSpinner = ->
-  $('.turbolink-spinner').fadeOut()
-
 window.unbindEvents = ->
   $(document).unbind('scroll')
   $(document).off('scroll')
-document.addEventListener("page:fetch", startSpinner)
 document.addEventListener("page:fetch", unbindEvents)
-document.addEventListener("page:change", stopSpinner)
 $ ->
   # Click a .one_click_select field, select the contents

app/assets/stylesheets/application.scss

@@ -7,6 +7,8 @@
  *= require select2
  *= require highlightjs.min
  *= require_self
+ *= require nprogress
+ *= require nprogress-bootstrap
 */
 @import "main/variables.scss";

app/views/layouts/_head_panel.html.haml

@@ -14,10 +14,6 @@
       .navbar-collapse.collapse
         %ul.nav.navbar-nav
-          %li.hidden-sm.hidden-xs
-            %a
-              %div.hide.turbolink-spinner
-                %i.icon-refresh.icon-spin
           %li.hidden-sm.hidden-xs
             = render "layouts/search"
           %li.visible-sm.visible-xs