[V4MD:DONE] API_way/Field_Find example

[Ruslan Zasukhin]

Hi team,

Subject is ready now.
Some new methods added to make it working to
VTable, VField, VSet, VSetIterator Xtra's that were not
exposed before, exactly:

    VTable.flush()
    VTable.selectAllRecords()
    VTable.selectNoneRecords()

    VField.find()
    VField.valueExists()

    VSet.release()

    VSetIterator.release()

and also many bugs fixed in VSet & VSetIterator Xtra's implementations.

-- 
Best regards,
Igor Gomon