Merge branch 'master' of https://github.com/stan-dev/stan
Merge branch 'master' of https://github.com/stan-dev/stan
Merge branch 'master' of https://github.com/stan-dev/stan
fix make/models for llvm-g++-4.2 on linux
shuffle function_signatures*.stan in test-unit
Merge branch 'master' of https://github.com/stan-dev/stan
Merge branch 'master' of https://github.com/stan-dev/stan
add more shuffling to make/tests
calculate average n_eff in rstan/example/demo.R
Merge branch 'master' of https://github.com/stan-dev/stan