Add OffsetFetchNext limit dialect

Add OffsetFetchNext limit dialect

This dialect supports SQL Server 2012.  It renders like this:

 SELECT me.id, me.source, me.owner, me.price, owner.id, owner.name
   FROM books me
   JOIN owners owner ON owner.id = me.owner
   WHERE ( source = ? )
   ORDER BY me.id
   OFFSET ? ROWS
   FETCH NEXT ? ROWS ONLY

http://msdn.microsoft.com/en-us/library/gg699618%28v=SQL.110%29.aspx

Note that it REQUIRES an ORDER BY clause