Replace screenshots

[simurai]

This PR replaces all screenshots with an updated 1.0 look and feel.

• Getting Started
• Using Atom (All except 2.1 that is part of PR Replace "Atom Packages" screenshots eebs/atom-docs#1)
• Hacking Atom
• Behind Atom
• Upgrading to 1.0 APIs (Unchanged)

[thomasjo]

Looks like you're using some sort of custom Finder shell (ref. book/01-introduction/images/open-file.png), perhaps it would be wise to use stock Finder to avoid confusion about missing checkbox and New Folder button? HERPADERP.

[mnquintana]

@thomasjo I think that is stock Finder - it's just the open dialog, rather than a regular Finder window.

[thomasjo]

I got a little confused when I wrote that comment. The New Folder button is certainly stock, but the... wait. There checkbox shows up if one hasn't checked the "Show all file extensions" option. So this is truly stock behavior indeed! Thanks for the clarification @mnquintana, and sorry to @simurai about the confusion 🙇

[simurai]

Maybe it also looked a bit odd because the window was not active.. I replaced it with an active one (blue Open button). Also the colored tags are shown:

[simurai]

Ok, I think this is ready.

In general it's a bit more "zoomed in", so it should be easier to see details and read text.

[lee-dohm]

Thanks @simurai 😀