Merge branch 'master' of https://github.com/stan-dev/stan
updating bugs_examples/vol2/beetles/beetles_*.stan tests
updating how model tests are run
updating model and tests for models/bugs_examples/vol2/alli/alli2
updating tests for models/bugs_examples/vol2/endo/endo1, endo2, endo3
Merge branch 'update_model_tests'
updating test to write exception message from model tests
using nondiagonal mass matrix to run NUTS
added #include <fstream> to mcmc/util.hpp
supressing unused warning for DUMMY_VAR__ in models
updating lower and upper bound tests for cdf
New test for inv_chi_square CDF
Fixed various bugs in CDF to pass unit-tests.
supressing unused var warning in models
Fixed various bugs in CDF to pass vectorized unit-tests.
updating test_fixture for cdf tests
Merge branch 'master' into cdf_tests
inv_gamma CDF unit tests.
More robust boundary values.
Added missing Double, vectorized tests.