added operator()() to lazy (no arguments)
added operator()() to lazy (no arguments)

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