ENH: pivot_table can now accept Grouper
Merge pull request #6913 from sinhrks/pivotg

ENH: pivot_table can now accept Grouper
Boxplot by quartile example code

Add mpl_style option as cookbook currently doesn't have plots
ENH: Added NDFrame.slice_shift

added slice_shift func docs and removed freq argument
BUG: Change Panel.shift to use slice_shift #6605 #6826

TST: Make sure Panel.shift retains dtypes

DOC: removed previous doc entries for #6605

Re-add note about dropping shifted periods

DOC: added note about bug fix

don't pass on freq