work on adding lbfgs
work on adding lbfgs
Merge branch 'add_lbfgs_issue_#82' of https://github.com/stan-dev/rstan into add_lbfgs_issue_#82
Merge pull request #89 from stan-dev/add_lbfgs_issue_#82

Add lbfgs issue #82
remove support for Nesterov optimization method