Best fit retrieval - handling NULL values

When any of the four good points are returned from a cycle that contains gaps or from an incomplete cycle with the query end time located inside of the calculation cycle the quality detail of each of the non-null points returned is modified to alert the user to this fact. This is done by performing a logical OR operation of the value 4096, which means partial cycle, onto the existing quality detail. (This is the delta point equivalent to the use of PercentGood for cyclic.)