adapt epsilon including when it is specified with 0
rstan, add epsilon jitter
Try harder when the line-search fails.
Print exit code when BFGS terminates early.
Save memory when using log_det_ldlt.
Merge branch 'master' of https://github.com/stan-dev/stan
#include <boost/math/special_functions/fpclassify.hpp>
2 #includes
Enabled delta/gamma options
fixed columns and rows dot product in fvar/matrix
fixed determinant header
added more tests to fvar_matrix
added log_determinant to fvar/matrix with tests
added mdivide_left to fvar/matrix with tests
added mdivide_right to fvar/matrix with tests
Merge branch 'master' of https://github.com/stan-dev/stan
rstan, add option of delta and gamma
Added Welford estimation classes

Factored adaptation algorithms from wrapper

Removed deprecated tests, added new ones

Fixed typo in include paths

Upated adaptation algorithm tests

Type in test vector initialization

Added Welford estimator tests

Adaptation refactor
Merge branch 'master' of github.com:stan-dev/stan

Merge adaptation refactor
rstan: calculation of number of saved draws differently due to the merge of hmc_refactor