DOC: Pandas Cheat Sheet (GH13202)
 - [x ] closes #13202 

Pandas Cheat Sheet.  Someone needs to figure out (or tell me the best way to do it!) how the PDF version gets integrated into the documentation tree.

I see!.

can you add a whatsnew note (put in a  path, I can fix if its not exactly right). @jreback Pushed out a whatsnew.  Not sure why there is a conflict.  The other thing I'm not sure of is whether the main documentation tree should have a link to the cheat sheet, and if so, how to make it so that the whole documentation build process isn't messed up by a link to something outside the tree. thanks!

I merged this, and so should show up on the doc-build.! (the whatsnew reference). https://github.com/pandas-dev/pandas/blob/master/doc/cheatsheet/Pandas_Cheat_Sheet.pdf

! once we upload this to pandas.pydata.org will need to fix the link
cc @jorisvandenbossche 