DOC: Comparison with SAS
closes #11075
xref #4052 

There doesn't seem to be a straightforward way to syntax highlight the SAS code, so it will format as generic code blocks.

lots of lexers here: http://pygments.org/docs/lexers/#lexers-for-the-r-s-languages

isn't it actual S syntax?
 No, SAS has its own syntax.
 can you render and post this page 
 can also add to the highlites section in v0.17.0 (and add to the release.rst the same line).
 Here's the rendered output - for some reason in-line code segments don't get rendered correctly locally for me (on all doc pages).
![docs](https://cloud.githubusercontent.com/assets/1924092/9838038/928815ee-5a18-11e5-814e-65e7a133c267.png)
 @chris-b1 looks pretty good.

I need a more full look, but @jorisvandenbossche ?
 @chris-b1 Really cool!!

just added some minor comments
 @jorisvandenbossche - pushed changes for your comments, thanks for taking a look.  Rendered output above is also updated.
 @chris-b1 just a couple of minor edits / suggestions.

really nice!

ping when ready for merge.
 Thanks!  @jreback pushed changes for your notes, should be good to merge.
 awesome. pls have a look once they are built and do a follow-up if needed!
