SQL Server: Reimplement limit and offset
SQL Server: Reimplement limit and offset

* This implementation requires SQL Server 2005 or greater, as it
  relies on the Row_Number() function.
* (Minor) changes also made to the DataObjects Adapter API to allow
  a qualifier to be specified where a property/column name must be
  qualified. This allows us to set the right scope in the subqueries
  necessary for implementing limit and offset in SQL Server.

Signed-off-by: Alex Coles <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@alexcolesportfolio.com>

datamapper/dm-sqlserver-adapter