commits: 34fd2b6cb94dfb824c5371c37b6eb5e70a88260f

This data as json

sha	message	author_date	committer_date	raw_author	raw_committer	repo	author	committer
34fd2b6cb94dfb824c5371c37b6eb5e70a88260f	use safe_cast_to_index to sanitize DataArrays for groupby (#1133) * groupby should pass ndarray to unique_value_groups #1132 * use safe_cast_to_index to sanitize DataArrays for groupby #1133 * add test for #1133 * correct issue number * minor cleanup * add note to whats new * fix formatting * repair Marco's umlaut * More descriptive what's new note	2016-12-19T17:11:57Z	2016-12-19T17:11:57Z	8af3b10c10c90e1d9609d09886d445e109ec86aa	f10b21bed2846b879806f87039b77245b18e7671	13221727	3404817	1217238