Update document.
Change qualify type to monad transformer.
Re-order monad stack.
Drop not used instance.
Renamed.
Drop record field.
Renamed.
Module moved.

--HG--
rename : relational-query/src/Database/Relational/Query/Monad/Qualify.hs => relational-query/src/Database/Relational/Query/Monad/Trans/Qualify.hs