trying to fix an issue of index out of bounds with rcpp 0.10
Merge tag 'v2.1.0' into hotfix/index_out_of_bounds

Conflicts:
	rstan/rstan/inst/include/rstan/stan_fit.hpp
checkout .travis.yml in develop branch
do not use name to access rcpp list
bump to version 2.1.1
fix a typo in rstan/inst/NEWS
Merge branch 'develop' of https://github.com/stan-dev/rstan into develop
Merge branch 'hotfix/index_out_of_bounds' into develop

Conflicts:
	rstan/rstan/inst/include/rstan/stan_fit.hpp