made copy Constructor of GraphSolver_Context explicit
made copy Constructor of GraphSolver_Context explicit

agra-uni-bremen/metaSMT,finnhaedicke/metaSMT,hoangmle/metaSMT,hoangmle/metaSMT,nbruns1/metaSMT,finnhaedicke/metaSMT,nbruns1/metaSMT,agra-uni-bremen/metaSMT,finnhaedicke/metaSMT,agra-uni-bremen/metaSMT,nbruns1/metaSMT,hoangmle/metaSMT