[dev] counting in buildAttributeQuery

[Duck]

I started to implement limiting in ansel selection and found out that the 
COUNT don't return the right value. seems that the GROUP BY makes trouble (in 
mysql surely, I dont know in other databases). It come out that the count 
returns count values for every row. I added the patches to choose from, that 
fix this issue. One uses DISTINCT for botch counting ans selecting. And the 
other leave GROUP BY for selecting and introduces DISTINCT for counting.

Duck
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