BFGS: print step size at each iteration, allow initial stepsize to be set from the command line (--epsilon), output epsilon parameter.
Merge branch 'master' of https://github.com/stan-dev/stan
Missed changes to BFGS.
Fix MCMC unit tests.
_err_stream should be ostream not ofstream
Finish conversion to ostream (as opposed to ofstream) and hopefully fix the unit tests.
rstan: less margin for the traceplot
Merge branch 'master' of https://github.com/stan-dev/stan
Finish ofstream -> ostream.
Merge remote-tracking branch 'upstream/master'
Fix MCMC unit tests.
Merge branch 'master' into metropolis