Create Shadow (#2071)

* Create Shadow

* Add automatically parsed data (9500)
[ci skip]

Co-authored-by: Travis CI <[email protected]>

apps/Shadow.md

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+---
+layout: app
+
+permalink: /Shadow/
+
+icons:
+  - Shadow/icons/1024x1024/shadow.png
+
+screenshots:
+  - Shadow/screenshot.png
+
+authors:
+
+links:
+
+desktop:
+  Desktop Entry:
+    Name: Shadow
+    Exec: AppRun
+    Terminal: false
+    Type: Application
+    Icon: shadow
+    StartupWMClass: Shadow
+    X-AppImage-Version: 5.0.615.4813
+    MimeType: x-scheme-handler/Shadow
+    Categories: Utility
+  AppImageHub:
+    X-AppImage-Signature: no valid OpenPGP data found. the signature could not be verified.
+      Please remember that the signature file (.sig or .asc) should be the first file
+      given on the command line.
+    X-AppImage-Type: 2
+    X-AppImage-Architecture: x86_64
+---

data/Shadow

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+https://update.shadow.tech/launcher/prod/linux/ubuntu_18.04/Shadow.AppImage

database/Shadow/shadow.desktop

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+[Desktop Entry]
+Name=Shadow
+Exec=AppRun
+Terminal=false
+Type=Application
+Icon=shadow
+StartupWMClass=Shadow
+X-AppImage-Version=5.0.615.4813
+MimeType=x-scheme-handler/Shadow;
+Categories=Utility;
+
+[AppImageHub]
+# Dear upstream developer, please include update information in your AppImage
+# (e.g., with appimagetool -u) so that users can easily update the AppImage
+X-AppImage-Signature=no valid OpenPGP data found. the signature could not be verified. Please remember that the signature file (.sig or .asc) should be the first file given on the command line. 
+X-AppImage-Type=2
+X-AppImage-Architecture=x86_64