message: Let build script set app-version instead of hardcording
diff: @@ -12,7 +12,7 @@ delete_app()
  compare_versions()
  {
  # Get the installer version:
  - CURRENT_VERSION=6.0.0
  + CURRENT_VERSION=APP_VERSION
  # Get the currently installed version:
  INSTALLED_VERSION=$(plutil -p /Applications/Symphony.app/Contents/Info.plist | awk '/CFBundleShortVersionString/ {print substr($3, 2, length($3)-2)}')
  