Changelog:

• Update to Node.js v4.1.1.
• Add allowpopups attribute for <webview> tag.
• Add options parameter for new-window event.
• Inherit parent window's options in child windows opened by window.open.
• Pass a DownloadItem object in the will-download event, allowing users to subscribe to download updates.
• Fix length of Buffer becoming 0 when there are lots of Buffer created.
• Fix crash when there is external ArrayBuffer created with pointers to addresses outside the heap.

Windows

• Fix leak of fds when reading files in asar archives.
• Fix tray icon not showing sometimes.

OS X

• Fix draggable regions not working for BrowserWindow with title-bar-style set to hidden.