Create desktop file for GNU-Linux

qTox.desktop

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+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=qTox
+GenericName=Tox client
+Comment=qTox is a powerful Tox client that follows the Tox design guidelines.
+TryExec=qtox
+Exec=qtox
+Icon=qtox
+Categories=InstantMessaging;;AudioVideo;Network;
+Terminal=false
+MimeType=x-scheme-handler/tox;