Fix string_to_scored_combo_tree so bscore is optional
Fix string_to_scored_combo_tree so bscore is optional

AmeBel/opencog,Allend575/opencog,Allend575/opencog,eddiemonroe/atomspace,shujingke/opencog,Tiggels/opencog,gaapt/opencog,sumitsourabh/opencog,jlegendary/opencog,misgeatgit/atomspace,ArvinPan/opencog,misgeatgit/opencog,Selameab/opencog,Allend575/opencog,prateeksaxena2809/opencog,roselleebarle04/opencog,ceefour/atomspace,ceefour/opencog,ruiting/opencog,kim135797531/opencog,kim135797531/opencog,AmeBel/opencog,williampma/opencog,gavrieltal/opencog,yantrabuddhi/atomspace,ceefour/atomspace,rohit12/opencog,UIKit0/atomspace,ceefour/opencog,MarcosPividori/atomspace,prateeksaxena2809/opencog,gaapt/opencog,virneo/opencog,iAMr00t/opencog,misgeatgit/opencog,TheNameIsNigel/opencog,virneo/opencog,inflector/opencog,sanuj/opencog,prateeksaxena2809/opencog,sumitsourabh/opencog,rodsol/opencog,inflector/atomspace,andre-senna/opencog,rTreutlein/atomspace,printedheart/opencog,virneo/atomspace,rohit12/opencog,misgeatgit/opencog,shujingke/opencog,UIKit0/atomspace,prateeksaxena2809/opencog,TheNameIsNigel/opencog,sumitsourabh/opencog,eddiemonroe/atomspace,cosmoharrigan/opencog,eddiemonroe/opencog,williampma/atomspace,printedheart/opencog,virneo/opencog,gavrieltal/opencog,TheNameIsNigel/opencog,cosmoharrigan/opencog,roselleebarle04/opencog,Selameab/opencog,sanuj/opencog,Selameab/atomspace,virneo/atomspace,rohit12/opencog,jswiergo/atomspace,williampma/atomspace,rTreutlein/atomspace,cosmoharrigan/atomspace,rohit12/atomspace,anitzkin/opencog,yantrabuddhi/atomspace,printedheart/atomspace,iAMr00t/opencog,andre-senna/opencog,yantrabuddhi/atomspace,gaapt/opencog,Selameab/opencog,sumitsourabh/opencog,roselleebarle04/opencog,williampma/opencog,Allend575/opencog,ruiting/opencog,gavrieltal/opencog,jlegendary/opencog,ArvinPan/opencog,cosmoharrigan/opencog,virneo/opencog,eddiemonroe/opencog,eddiemonroe/atomspace,cosmoharrigan/atomspace,ArvinPan/opencog,inflector/atomspace,tim777z/opencog,eddiemonroe/opencog,printedheart/atomspace,AmeBel/atomspace,virneo/atomspace,ArvinPan/opencog,ruiting/opencog,Selameab/opencog,anitzkin/opencog,ArvinPan/atomspace,rodsol/atomspace,sanuj/opencog,rohit12/opencog,gaapt/opencog,jswiergo/atomspace,rodsol/atomspace,rodsol/atomspace,anitzkin/opencog,cosmoharrigan/opencog,printedheart/atomspace,ArvinPan/opencog,williampma/opencog,ceefour/opencog,ArvinPan/opencog,misgeatgit/atomspace,yantrabuddhi/opencog,ceefour/opencog,williampma/opencog,printedheart/opencog,roselleebarle04/opencog,andre-senna/opencog,eddiemonroe/atomspace,eddiemonroe/opencog,williampma/opencog,rodsol/opencog,Tiggels/opencog,Selameab/atomspace,inflector/opencog,gavrieltal/opencog,Selameab/atomspace,eddiemonroe/opencog,kinoc/opencog,tim777z/opencog,rodsol/atomspace,cosmoharrigan/atomspace,sumitsourabh/opencog,MarcosPividori/atomspace,AmeBel/atomspace,prateeksaxena2809/opencog,inflector/atomspace,misgeatgit/opencog,gavrieltal/opencog,printedheart/atomspace,misgeatgit/opencog,ceefour/opencog,inflector/opencog,misgeatgit/atomspace,AmeBel/atomspace,MarcosPividori/atomspace,virneo/opencog,sanuj/opencog,ceefour/opencog,anitzkin/opencog,rodsol/opencog,ruiting/opencog,andre-senna/opencog,misgeatgit/opencog,kim135797531/opencog,jlegendary/opencog,williampma/atomspace,Tiggels/opencog,inflector/opencog,yantrabuddhi/opencog,ceefour/atomspace,yantrabuddhi/opencog,jswiergo/atomspace,kinoc/opencog,shujingke/opencog,kim135797531/opencog,tim777z/opencog,ArvinPan/atomspace,prateeksaxena2809/opencog,shujingke/opencog,eddiemonroe/opencog,tim777z/opencog,williampma/atomspace,printedheart/opencog,AmeBel/opencog,AmeBel/atomspace,UIKit0/atomspace,ruiting/opencog,rodsol/opencog,ceefour/atomspace,printedheart/opencog,AmeBel/opencog,andre-senna/opencog,ruiting/opencog,rodsol/opencog,Selameab/atomspace,inflector/opencog,eddiemonroe/opencog,AmeBel/opencog,anitzkin/opencog,AmeBel/opencog,gaapt/opencog,rohit12/opencog,kim135797531/opencog,AmeBel/opencog,sanuj/opencog,rTreutlein/atomspace,roselleebarle04/opencog,andre-senna/opencog,gaapt/opencog,sumitsourabh/opencog,misgeatgit/atomspace,AmeBel/atomspace,Tiggels/opencog,printedheart/opencog,iAMr00t/opencog,jswiergo/atomspace,roselleebarle04/opencog,inflector/opencog,cosmoharrigan/opencog,yantrabuddhi/opencog,kinoc/opencog,gavrieltal/opencog,TheNameIsNigel/opencog,kinoc/opencog,gavrieltal/opencog,yantrabuddhi/opencog,rohit12/atomspace,sanuj/opencog,cosmoharrigan/opencog,inflector/opencog,ArvinPan/atomspace,kim135797531/opencog,anitzkin/opencog,anitzkin/opencog,jlegendary/opencog,sumitsourabh/opencog,TheNameIsNigel/opencog,MarcosPividori/atomspace,rohit12/opencog,Allend575/opencog,eddiemonroe/atomspace,virneo/opencog,virneo/atomspace,andre-senna/opencog,gaapt/opencog,inflector/atomspace,yantrabuddhi/atomspace,rodsol/opencog,TheNameIsNigel/opencog,rohit12/atomspace,misgeatgit/atomspace,rohit12/atomspace,rTreutlein/atomspace,williampma/opencog,kinoc/opencog,Allend575/opencog,ceefour/opencog,shujingke/opencog,ArvinPan/atomspace,rTreutlein/atomspace,kinoc/opencog,shujingke/opencog,iAMr00t/opencog,yantrabuddhi/opencog,Tiggels/opencog,Selameab/opencog,yantrabuddhi/opencog,yantrabuddhi/atomspace,kinoc/opencog,kim135797531/opencog,roselleebarle04/opencog,tim777z/opencog,inflector/atomspace,inflector/opencog,Tiggels/opencog,misgeatgit/opencog,UIKit0/atomspace,prateeksaxena2809/opencog,tim777z/opencog,iAMr00t/opencog,misgeatgit/opencog,jlegendary/opencog,misgeatgit/opencog,Selameab/opencog,virneo/opencog,ruiting/opencog,jlegendary/opencog,Allend575/opencog,iAMr00t/opencog,cosmoharrigan/atomspace,shujingke/opencog,jlegendary/opencog