cubicweb-brainomics #4045032 Add standard scores and scales [validation pending]

Eg. ECOG (http://en.wikipedia.org/wiki/Performance_status#Lansky_score), ...

prioritynormal
typebug
done in0.12.0
load0.100
load left0.000
closed by#e9d74780f15e [scales] Add scales files, closes #4045032
patch[scales] Add scales files, closes #4045032 [applied]