Merge branch 'develop' of https://github.com/stan-dev/stan into bugfix/issue-1177-keyword-var
Merge branch 'develop' of https://github.com/stan-dev/stan into bugfix/issue-1177-keyword-var
fix #1177, allow variables with prefixes matching keywords
Merge pull request #1182 from stan-dev/bugfix/issue-1177-keyword-var

Bugfix/issue 1177 keyword var
Merge branch 'develop' of https://github.com/stan-dev/stan into bugfix/issue-1151-fun-var-constraints
fixed mock model to use new 3-arg constraint