Add Node.js LTS documentation

assets/stylesheets/global/_icons.scss

@@ -34,7 +34,8 @@
 ._icon-dom_events:before    { background-position: -3rem -1rem; }
 ._icon-javascript:before    { background-position: -4rem -1rem; }
 ._icon-backbone:before      { background-position: -5rem -1rem; @extend %darkIconFix !optional; }
-._icon-node:before          { background-position: -6rem -1rem; }
+._icon-node:before,
+._icon-node_lts:before      { background-position: -6rem -1rem; }
 ._icon-sass:before          { background-position: -7rem -1rem; }
 ._icon-less:before          { background-position: -8rem -1rem; }
 ._icon-angular:before       { background-position: -9rem -1rem; }

lib/docs/scrapers/node_lts.rb

@@ -0,0 +1,9 @@
+module Docs
+  class NodeLts < Node
+    self.name = 'Node.js (LTS)'
+    self.slug = 'node_lts'
+    self.type = 'node'
+    self.version = '4.2.1'
+    self.base_url = 'https://nodejs.org/dist/v4.2.1/docs/api/'
+  end
+end