[tex4ht] tex4ht with pgfplots and external legends

[Karl Berry]

    Is pgpfplots actually supported by tex4ht? 

pgfplots was first released in 2008.  Eitan died in June 2009.

Certainly nothing has been done to update the tex4ht support for pgfplots
since then :(.  I hope it will happen at some point, but I suspect it
will take a rather intensive research effort to even begin to figure out
what needs updating.  I hope CVR will prove me wrong :).

k