WIP: HREF Support
This is the href and xlink:href support. This includes this logic:
- Read in any
hrefattribute, failing that, read inxlink:hrefinstead. - Use this href attribute in the same ways as the xlink alternative
- When writing out, keep writing out
xlink:href, but removehrefto avoid duplication (this may be switched around in a future merge request) - Assume all features of
xlink:hrefas the same ashref(for example image data)
Edited by Martin Owens