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
add optional default value to GroupBy.get_group