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.
* Introduce the nicebundle. This is a kind of plugin, that just enables
many other plugins. It's an easy way to boost ikiwiki from its default,
basic wiki, to a full-featured wiki, without manually picking the right
set of plugins. New plugins will be added to the nicebundle from time to
time.
joey