10 Dec 2001 - 1.10

Corrected the logic errors in PPVL_duplicate_parameter and
PPVL_duplicate_value that were prevent the duplication
of leave nodes.


3 Dec 2001 - 1.9

Provided at test for missing (NULL) parameter list
in PPVL_remove_parameter. This was causing a segv
when an attempt was made to remove a parameter from
an aggregate with an empty list anywhere within it.


21 Dec 2000 - 1.8.1a

Minor touchups to the HTML manual pages.