OEDepict TK 2.4.3

Minor bug fixes

• The signature of the OECreateWin32GraphicsImage function has been changed to use std::shared_ptr.

• SVG group IDs and names are now limited to 64 characters.

Python-specific changes

• User-defined atom and bond SVG markings are now supported in Python. See the examples in the OEAtomSVGMarkupBase and OEBondSVGMarkupBase base classes.