Io to clipboard
Added documentation for to_clipboard().
Closes #3784

~~Is it worth adding a note in the APIs about system requirements aka #3837 (not if below pull is merged.)~~
 @nipunreddevil  If you update your banch that will be reflected here.
 OK. Whats the note to be now put in the documentation?

On Thu, Jun 13, 2013 at 5:18 PM, Andy Hayden notifications@github.comwrote:

> @nipunreddevil https://github.com/nipunreddevil If you update your
> banch that will be reflected here.
> 
> —
> Reply to this email directly or view it on GitHubhttps://github.com/pydata/pandas/pull/3845#issuecomment-19386728
> .
 Updated to put code in one ipython block and note reflects documentation from docstring.
 Thanks for spotting the typo!
 Fixed the typo. The docs still take ever so long to build!
 you should rebase on master, that prob was fixed a few commits ago

```
git co master
git pull
git br yourbranch --set-upstream master
git co yourbranch
git pull --rebase
```
