Changelog:

• The BrowserWindow.capturePage now passes NativeImage instance instead of Buffer.
• Add type option for BrowserWindow to allow changing _NET_WM_WINDOW_TYPE property of the window.
• Add BrowserWindow.setOverlayIcon API.
• Add native-image module for low level image operations.
• Add clipboard.readImage API.
• Add before-quit event for app module.
• Enable setting icon for MenuItem.
• Bundle all .js files into asar archive.
• Fix using images from asar archives in atom-shell APIs.
• Fix parsing some window.open options.
• The display style attribute of <webview> is block by default.