electron v0.37.3

Changelog:

• <webview>'s background is now transparent by default.
• Add NativeImage.getNativeHandle() API.
• Add -i/--interactive flag to default app that starts a repl for the main process.
• Fix occasional exception when using remote module.
• Fix devtools workspace not working.
• Fix exception when accelerator is undefined when calling Menu.buildFromTemplate.

Windows

• Automatically set Application User Model ID when Squirrel.Windows is used.
• Fix crash when showing notifications while notifications are disabled.