Merge remote-tracking branch 'upstream/develop' into shigusegubu

* upstream/develop: (25 commits)
  improve notification subscription
  Fix typo that prevented scope copy from working.
  added check for activatePanel is function or not
  addressed PR comments
  activate panel on user screen click
  added not preload check so hidden toggles asap
  removed counters from left panel
  added router-links to all relavent links
  added activatePanel onclick for timeago button
  added PR comments
  add checkbox to disable web push
  removed brackets from condition
  resolved lint issue
  renamed config to preload images and add ident to config
  added config for preload and made attachment responsive to it
  preload nsfw image
  fix race condition
  improve push notifications code
  second attempt to add subscribe module and fix race condition
  Revert "add subscribe module and fix race condition"
  ...

build/webpack.base.conf.js

@@ -2,6 +2,7 @@ var path = require('path')
 var config = require('../config')
 var utils = require('./utils')
 var projectRoot = path.resolve(__dirname, '../')
+var ServiceWorkerWebpackPlugin = require('serviceworker-webpack-plugin')
 
 var env = process.env.NODE_ENV
 // check env & config/index.js to decide weither to enable CSS Sourcemaps for the
@@ -91,5 +92,10 @@ module.exports = {
         browsers: ['last 2 versions']
       })
     ]
-  }
+  },
+  plugins: [
+    new ServiceWorkerWebpackPlugin({
+      entry: path.join(__dirname, '..', 'src/sw.js')
+    })
+  ]
 }