Log Message:
update to 2.8.5
changes:
Make LIMIT work on a compound SELECT statement.
LIMIT 0 now shows no rows. Use LIMIT -1 to see all rows.
Correctly handle comparisons between an INTEGER PRIMARY KEY and a
	floating point number.
Fix several important bugs in the new ATTACH and DETACH commands.
Updated the NULL-handling document.
Allow NULL arguments in sqlite_compile() and sqlite_step().
Many minor bug fixes
Enhanced the "PRAGMA integrity_check" command to verify indices.
Added authorization hooks for the new ATTACH and DETACH commands.
Many documentation updates