DOC: add basic documentation to some of the GroupBy properties and methods
DOC: add GroupBy class to api.rst
DOC: add import for GroupBy object to api.rst
DOC: add GroupBy.aggregate and GroupBy.transform to api.rst
DOC: add meta comment to api.rst about when GroupBy objects are created
DOC: add links to api.rst
ENH: mutliple series for FRED
Add image for whatsnew docs
TST: dtype issue in test_groupby.py on windows
Merge pull request #5598 from pydata/winfix3

TST: dtype issue in test_groupby.py on windows (GH5595)
DOC: limit code snippet output to max_rows=15
Merge pull request #5599 from y-p/PR_doc_set_max_rows

DOC: limit code snippet output to max_rows=15
Merge pull request #5492 from TomAugspurger/fred_multi_series

ENH: accept mutliple series for FRED DataReader
Merge pull request #5594 from takluyver/repr-whatsnew-img

Add image for whatsnew docs
TST/API: test the list of NA values in the csv parser. add N/A, #NA as independent default
         na values (GH5521)
Merge pull request #5601 from jreback/na_values

TST/API: test the list of NA values in the csv parser. add N/A, #NA as independent default values (GH5521)
Merge pull request #5459 from dwiel/groupby_comments

DOC: add basic documentation to some of the GroupBy properties and methods
BUG: repr formating to use iloc rather than getitem for element access (GH5605)
Merge pull request #5606 from jreback/fix_repr

BUG: repr formating to use iloc rather than getitem for element access (GH5605)
RLS: first release candidate for v0.13