DOC: closes gh6838. Breakout options.rst from basics.rst
closes #6838. 
closes #3104 
Breakout "options" section for docs, heavily using info already in `basics.rst`. Expands examples, and turns `describe_options` into a table.

also their is a section in the FAQ which you can incorporate (or maybe just delete)
 I the top level you can render this and how it?
 What is the best way to get the .html up here?
 see here: https://github.com/pydata/pandas/pull/7398

You make a `.png` and then gh will show it
 ![options and settings pandas 0 14 0-117-g8536e05 documentation](https://cloud.githubusercontent.com/assets/4166648/3403513/03a86608-fd67-11e3-8001-34eb5121b055.png)
 Wonderfull! 
I will only be able to give this a review beginning next week.

BTW, as an alternative to show the output, instead of a png, you can also push it to github pages. See eg https://github.com/jorisvandenbossche/example-pandas-docs (I pushed the relevant pages (+ the static folder for css) to a folder in that repo for each pr, and then we can look at it that way). Then you can just give that link, and update the content if changes are made. (But do as you like!)
 ![options and settings -2](https://cloud.githubusercontent.com/assets/4166648/3438378/e847da02-00c6-11e4-9c7d-d0477879ea52.png)
 I'm seeing the same Travis-CI build errors for pull request [#7619](https://github.com/pydata/pandas/pull/7619). These build errors don't seem to be related to the pull requests.
 @clham Do you have time the coming days to process the comments?
 Yes. Sorry about dropping this,  I started a new job this week and have
been slammed.
On Jul 5, 2014 9:51 AM, "Joris Van den Bossche" notifications@github.com
wrote:

> @clham https://github.com/clham Do you have time the coming days to
> process the comments?
> 
> —
> Reply to this email directly or view it on GitHub
> https://github.com/pydata/pandas/pull/7578#issuecomment-48086888.
 No problem, let know when you find some time to update. 
Pushing this to 0.15 (as it is not critical for the release)
 ![options and settings -3](https://cloud.githubusercontent.com/assets/4166648/3489569/6bd8ddac-0537-11e4-84e0-e9bd6b40cca5.png)
 looking sexy :)
 @clham Really thanks a lot! 
Looking very good, so let's merge this, and we can always correct or update later if there are some more issues.
