Added News UI.

Added News UI and implemented functionality.
Removed westeroscraft.xml as we don't need to cache it.
Updated westeroscraft.json.
Updated Electron to v2.0.0

app/assets/js/assetguard.js

@@ -1555,6 +1555,9 @@ class AssetGuard extends EventEmitter {
                         cb()
                     }
                 })
+                req.on('error', (err) => {
+                    self.emit('dlerror', err)
+                })
                 req.on('data', function(chunk){
                     count += chunk.length
                     self.progress += chunk.length