fixed how similarities are gathered: if S(w1, w2) is already computed, (w2, w1) is skipped 	modified:   src/pymachine/similarity.py
fixed how similarities are gathered: if S(w1, w2) is already computed,
(w2, w1) is skipped
	modified:   src/pymachine/similarity.py

recski/pymachine,kornai/pymachine,Eszti/pymachine,recski/pymachine,Eszti/pymachine,kornai/pymachine