add log.js module for renderer logging

renderer/index.js

@@ -283,6 +283,7 @@ function setupIpc () {
   ipcRenderer.send('ipcReady')
 
   ipcRenderer.on('log', (e, ...args) => console.log(...args))
+  ipcRenderer.on('error', (e, ...args) => console.error(...args))
 
   ipcRenderer.on('dispatch', (e, ...args) => dispatch(...args))