Added new persistent sampler that does not change the chain state, useful for forward sampling using generated quanities only
Merge branch 'develop' into feature/persistent_sampler

Conflicts:
	make/tests
Fix broken test, update doc
making test clearer
Changed name from persistent sampler to fixed parameter sampler
Merge branch 'develop' into feature/persistent_sampler
Updated tests
Merge branch 'feature/persistent_sampler' of github.com:stan-dev/stan into feature/persistent_sampler

Conflicts:
	src/test/mcmc/fixed_param_sampler_test.cpp
Working empty sampler test
Unified interface for autodiff'ing models
Fix model functional to work with higher-order autodiff by specifying template parameters; add test
Remove domain test for the moment
Update definition of tree depth
remove test dependency on compiling grammars
moved location of static pattern rule to after GRAMMAR_TESTS were defined
Bumped the number of parameters to skip to take into account new NUTS diagnostic
Use proper gradient template parameters
Merge pull request #505 from stan-dev/feature/issue-493-remove-test-dependency-on-compiling-grammars

fixes #493. remove test dependency on compiling grammars
Merge branch 'develop' into feature/uniform_autodiff_pattern

Conflicts:
	.gitignore
	make/tests
	src/test/CmdStan/command_test.cpp
Merge branch 'feature/issue_296' into develop