initializing local variables fixes issue 91; still need automated test
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-91
making operator<< for var safe for uninitialized values
adding test for model in issue #91
Merge branch 'develop' into feature/issue-91
Merge pull request #135 from stan-dev/feature/issue-91

Fixes #91.