several improvements to tpc ca standalone qa (fix fit stability, notation, and histogram scaling)
several improvements to tpc ca standalone qa (fix fit stability, notation, and histogram scaling)

alisw/AliRoot,ALICEHLT/AliRoot,miranov25/AliRoot,ALICEHLT/AliRoot,sebaleh/AliRoot,shahor02/AliRoot,alisw/AliRoot,alisw/AliRoot,coppedis/AliRoot,alisw/AliRoot,miranov25/AliRoot,miranov25/AliRoot,ALICEHLT/AliRoot,ALICEHLT/AliRoot,miranov25/AliRoot,alisw/AliRoot,sebaleh/AliRoot,shahor02/AliRoot,alisw/AliRoot,miranov25/AliRoot,alisw/AliRoot,coppedis/AliRoot,miranov25/AliRoot,ALICEHLT/AliRoot,shahor02/AliRoot,shahor02/AliRoot,coppedis/AliRoot,shahor02/AliRoot,sebaleh/AliRoot,sebaleh/AliRoot,shahor02/AliRoot,ALICEHLT/AliRoot,miranov25/AliRoot,sebaleh/AliRoot,shahor02/AliRoot,coppedis/AliRoot,coppedis/AliRoot,alisw/AliRoot,sebaleh/AliRoot,ALICEHLT/AliRoot,coppedis/AliRoot,miranov25/AliRoot,coppedis/AliRoot,coppedis/AliRoot,sebaleh/AliRoot