Add Progress Bar

[dustinblackman]

3% for checking versions
2% for downloading champs from Riot
90% for processing (divided by the amount of champs)
2.5% for deleting
2.5% for saving

[dustinblackman]

Add this. https://github.com/atom/electron/blob/master/docs/tutorial/desktop-environment-integration.md#progress-bar-in-taskbar-windows--unity