Merge branch 'develop' of https://github.com/stan-dev/stan into develop
moved tests for raise exception to no-main
test raise exception in model block
adding tests for model block behaviors
Merge branch 'develop' of https://github.com/stan-dev/stan into develop
cosmetics for Weibull
add Frechet distribution

based on Weibull code
add function signatures tests for Frechet distribution
removed extraneous doublevectorview in pareto distr
add lomax_log with tests
switched lomax to pareto_type_2 and added rest of prob functions
added function signatures with tests
removed lomax
add pareto_type_2 to manual
add _rng test for Frechet distribution
test that exception is thown in model block by calling that block (i.e. model's log_prob method) directly
test function that raises exception, called from model block
Merge branch 'feature/issue-580-lomax-distr' of https://github.com/stan-dev/stan into feature/issue-580-lomax-distr
removed lomax distr from function signatures
updated doc