scipy.stats.sigmaclip doesn't appear in the html docs.

[cdeil]

See here:
http://docs.scipy.org/doc/scipy-dev/reference/stats.html

This PR should add it (untested).

[coveralls]

Coverage remained the same when pulling 64c0046 on cdeil:docs_sigmaclip into 1b34692 on scipy:master.

[rgommers]

Thanks, merging.

[cdeil]

It would be nice to be able to check if this actually worked.
At the moment the online dev version docs are not updating, the page says "Last updated on Jan 26, 2014." ... @pv maybe you can fix the docs build?

[pv]

I cannot fix the build, because the server does not have enough memory.

Setting up the job somewhere else is doable, but that is pretty low in
the priority queue.

[pv]

Also, you can just build the docs locally on your own machine to check these things.

[rgommers]

I've checked this locally.