(test) add circle.yml file
Merge pull request #1 from BaBuDe/master

(test) add circle.yml file
(bug) fix spacing in circle.yml
Merge pull request #2 from BaBuDe/master

(bug) fix spacing in circle.yml
(bug) fix typo in circle.yml
Merge pull request #3 from BaBuDe/master

(bug) fix typo in circle.yml
(bug) fix carolyn's typo