Auto-Update the Installer itself.

[mikeal]

Probably needs different code for both Mac, Windows and Linux.

[mikeal]

https://github.com/electron/electron/blob/master/docs/api/auto-updater.md

[develar]

electron-builder creates mac-zip for Squirrel.Mac and nuget for Squirrel.Windows.

On Linux I recommend to use AppImage (electron-builder will support it this week — https://github.com/electron-userland/electron-builder/issues/504).

So, if you will use electron-builder, this task is a straight-forward :) MAS target (to fix #6) is supported also.

[priyank-p]

Do we still use this installer on the website?