DOC: isin Example for .13 release notes
I also fixed a few typos in a separate commit.  I can remove that commit if they're going to cause conflicts.

Also did I get the syntax correct for this link? 

> See :ref:`Boolean Indexing<indexing.boolean>` for more

Okay, I moved the Series and DataFrame isin sections of `indexing.rst` into their own subsection under Basics.

So pending a decision on how to handle #4421, which I don't have time to get to today, I think this is ready to go.

Off topic: @jreback were you aware that the `to_datetime` examples in What's New are failing?  http://pandas.pydata.org/pandas-docs/dev/whatsnew.html#enhancements

I wanted to check before making an issue.
 @TomAugspurger you mean the `to_timedelta` ones.....do you see that big warning about requiring numpy 1.7, unfortunately the build machine (which @changhiskhan / @wesm) run runs 1.6.2 :(.

timedeltas are so broken in 1.6 that only very limited ops can be done
 Added the Series example.
 perfect..thanks
 @TomAugspurger can your rebase this and can get in
 @jreback rebased… but the typo fixes I made in my [second commit](https://github.com/TomAugspurger/pandas/commit/ad2986ec48bfc650b097e01f18caa268ea4038b6) got tangled up with some changes someone (probably you) made to the HDF5 notes.  Lines 35-109 my PR.  Should I go back to before my rebase and do it again with just the changes in my first commit?  There's a way to select which commits get applied right?
 `git rebase -i upstream/master` should work
 Ok, should be good to go.
 gre8 thanks
 @TomAugspurger @hayd I slightly changed the isin example in v0.13.0 (because it got moved and df was not defined correctly). Pls verify it and change if needed.
 Looks good.
