Make restore settings script executable

fixes #222

set-recommended-gnome-shell-settings.sh

@@ -13,6 +13,9 @@ if [[ $GNOME_SHELL_VERSION > "GNOME Shell 3.3" ]]; then
    USE_OVERRIDE_SCHEMA=true
 fi
 
+echo -e "#!/usr/bin/env bash\n\n" > $RESTORE_SETTINGS_SCRIPT
+chmod +x $RESTORE_SETTINGS_SCRIPT
+
 function set-with-backup {
     SCHEMA=$1
     KEY=$2
@@ -51,5 +54,6 @@ set-with-backup org.gnome.shell.overrides edge-tiling false
 set-with-backup org.gnome.shell.overrides attach-modal-dialogs false
 
 
+
 echo
 echo "Run $RESTORE_SETTINGS_SCRIPT to revert changes"