ENC: better pandas typesetting in ipython nbconvert --to latex
Currently, when IPython notebooks are converted to latex, pandas `DataFrame`s are appear as raw (verbatim) text. One simple solution is to include a `_repl_latex_` function. I have tried this solution and works. See https://github.com/ipython/ipython/issues/8261

This is a nice idea!

Could you please add a basic test? Could be something as simple as `assert ds._repl_latex_() == ds.to_latex()`, just so we know this doesn't get broken in the future.

Also, this will need a release note in the what's new:
http://pandas-docs.github.io/pandas-docs-travis/contributing.html#documenting-your-code
 Nice idea indeed, I was only wondering if there is a way to make this configurable? Maybe on the nbconvert side? 
As I can imagine you don't always want a full tex table, eg when writing a tutorial where you want to have it look like console input/output
 Well, yes... I was thinking of a simple fix... but it would be nice to be able to pass options in the way that you can pass them no to `to_latex`. Maybe store those options in a singleton and reuse them? Is there any similar situation in pandas?
 We already have `pd.set_options` and `pd.option_context`: http://pandas.pydata.org/pandas-docs/version/0.16.0/options.html

So that would be a pretty easy way to add this customization if you're interested. But (from my perspective), that shouldn't be a requirement for this PR.
 @lmarti can you update with a test and options as described above
 @jreback yes! in the next couple of days. Sorry for the delay.
 @lmarti can you add a test
 @lmarti can you add a basic tests for this?
 @lmarti pls update according to the comments
 @lmarti can you update according to comments
 I have sent a new PR (https://github.com/pydata/pandas/pull/11399) that contains all the requested modifications. Thanks for the wait.
