attempt to add read count to recent books view
add some debugging
extra debug info
build fix
extra query debug info
some debug statements
placeholder for future function
test code for cleaning up obsolete book entries. not build tested yet
build fix, add rss reader entry
another build fix
add some debug statements wrt series
build fix
finally fixed book cleanup

todo: maybe add vacuum after cleanup
moved schema creation separate from initial data entry procedures;

todo: add indexes to speed up book-related queries
add a couple of indexes to schema
fix incorrect column, add vacuum as a test
fix up opf metadata readouts

series_index was almost always 0, since calibre started using floats for series numbering

series was also often not scanned properly
fix up metadata reads from calibre for good.

turns out calibre likes to reverse tags (value before name) which tripped the scanning
comment out a few debug statements
add series index to title