DOC: sponsor notice
cc @jorisvandenbossche 
cc @cpcloud 
cc @shoyer 
cc @wesm 

Seems like a good idea to me
 @jorisvandenbossche @TomAugspurger 

anyone see what's wrong with this link? at the top
http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html
 `:: _numfocus organization:` should be
`.. _numfocus organization:` I think.
 @jreback I already fixed it, but it is still in the build queue I suppose, so it is not yet fixed online

and indeed, @TomAugspurger is correct
 @jorisvandenbossche oh, I just pushed the fix :)
 but in the wrong direction! :-) (you made it incorrect again)
 @jorisvandenbossche oh really? shoot. ok how about your turn :)
 Reverting on master is bad practice I suppose?
 no it's fine go ahead
