re-organized record retrieval such that special element set names

re-organized record retrieval such that special element set names
zebra::index           display all indexed terms from all indexes
zebra::index::title    display all terms from only title index
zebra::index::title:p  display all terms from only title index type p
zebra::meta::sysno     display only zebra internal record sysno
zebra::data            dislpay raw record binary data as SUTRS
all work
More testing with zebra:.data is needed
Sitll missing zebra::meta::filename, zebra::meta::count, etc ..
Better error messages would be an asset...