Improve API design

[HUSSTECH]

Not currently fully satisfied with the API design of SQLpy. The pattern of specifying a number as an argument to dictate how many results are returned i.e. sql.QUERY(cursor, 4, args) or sql.Query(cursor, 0, args) is not very python IMHO. Especially specifying 0 for a fetch_all type operation is not clear at all.

Proposal roughly is to add methods i.e. .all(), .one(), .many(n) to be executed on a SQLpy object rather than automatically returning the results of the SQLpy function partial.

[HUSSTECH]

Solution: use an keyword argument to define if the cursor uses fetchmany, fetchone or fetchall. Also return the cursor as part of the results to allow the user flexibility to use other features of the cursor provided by the DB 2.0 API library.