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
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
remove LOG_ZERO return
consolidated use of complex expressions
removed extra decimals pareto_type_2_test
added pareto_type_2_rng with tests
updated doc
added function signatures for pareto_type_2_rng
added hardcoded quantiles for pareto_type_2_rng test
fixed distr test errors
fix merge conflict
Merge branch 'develop' into feature/issue-580-lomax-distr
Merge branch 'develop' into feature/issue-580-lomax-distr