[gnome-boxes-logos] Add screenshots

[Felipe Borges <felipeborges src gnome org>]

commit 907388bdd3b28aeab59e86b6a57225de4655f2b6
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Mar 11 11:31:42 2019 +0000

    Add screenshots
    
    We are already doing hot-linking against this repository for the
    logos. By having the screenshots here we can later benefit from
    some metrics if this gets approved by the GNOME Foundation. Also,
    we save a couple of megabytes from the main gnome-boxes git
    repository.
    
    See https://gitlab.gnome.org/GNOME/gnome-boxes/issues/210
    
    https://www.freedesktop.org/software/appstream/docs/chap-Quickstart.html

 screenshots/01-icon-view.png       | Bin 0 -> 137301 bytes
 screenshots/02-download-an-os.png  | Bin 0 -> 115224 bytes
 screenshots/03-windows-vm.png      | Bin 0 -> 465957 bytes
 screenshots/04-express-install.png | Bin 0 -> 63587 bytes
 screenshots/05-shared-folders.png  | Bin 0 -> 514268 bytes
 screenshots/06-downloading.png     | Bin 0 -> 60720 bytes
 6 files changed, 0 insertions(+), 0 deletions(-)
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diff --git a/screenshots/01-icon-view.png b/screenshots/01-icon-view.png
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diff --git a/screenshots/02-download-an-os.png b/screenshots/02-download-an-os.png
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diff --git a/screenshots/03-windows-vm.png b/screenshots/03-windows-vm.png
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diff --git a/screenshots/04-express-install.png b/screenshots/04-express-install.png
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diff --git a/screenshots/05-shared-folders.png b/screenshots/05-shared-folders.png
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diff --git a/screenshots/06-downloading.png b/screenshots/06-downloading.png
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