for extended pagespecs. The old calling convention will still work for
back-compat for now.
* The calling convention for functions in the IkiWiki::PageSpec namespace
has changed so they are passed named parameters.
* Plugin interface version increased to 2.00 since I don't anticipate any
more interface changes before 2.0.
parameters remain the same, but additional options are now passed in using
named parameters.
* Change plugin interface version to 1.02 to reflect this change.
* Add a new anchor option to htmllink. Thanks Ben for the idea.
* Support anchors in wikilinks.
* Add a "more" plugin based on one contributed by Ben to allow implementing
those dreaded "Read more" links in blogs.