Changes for version 1.17

Modules

A manager for inverted index maps
A manager for autoloading Search::InvertedIndex modules
A Berkeley database interface object for Search::InvertedIndex
A MySQL database interface object for Search::InvertedIndex
A query for an inverted index search.
A query leaf item for an inverted index search.
A list of result entries from a inverted index search.
A container for a mass data update for a -group/-index.