add get_elapsed_secs help function; use it to set elapsed_secs on exit
add get_elapsed_secs help function; use it to set elapsed_secs on exit

fivejjs/crosscat,fivejjs/crosscat,JDReutt/BayesDB,JDReutt/BayesDB,probcomp/crosscat,fivejjs/crosscat,poppingtonic/BayesDB,mit-probabilistic-computing-project/crosscat,JDReutt/BayesDB,JDReutt/BayesDB,poppingtonic/BayesDB,poppingtonic/BayesDB,mit-probabilistic-computing-project/crosscat,probcomp/crosscat,mit-probabilistic-computing-project/crosscat,probcomp/crosscat,mit-probabilistic-computing-project/crosscat,mit-probabilistic-computing-project/crosscat,JDReutt/BayesDB,probcomp/crosscat,poppingtonic/BayesDB,probcomp/crosscat,mit-probabilistic-computing-project/crosscat,probcomp/crosscat,poppingtonic/BayesDB,probcomp/crosscat,fivejjs/crosscat,mit-probabilistic-computing-project/crosscat,probcomp/crosscat,fivejjs/crosscat,fivejjs/crosscat,fivejjs/crosscat