Queryparser Driver: SQL Generation Tweaks

Queryparser Driver: SQL Generation Tweaks

Remove fwhere/where distinction due to issues with detecting where some
operators were supposed to go.

Change format to a callback instead of forcing it to the top of the tree.

Change date-based filters to work in nested situations.

Change container and record_list to work in nested situations.

Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>