[Cython] Bugfix release

[Stefan Behnel]

Stefan Behnel, 11.09.2011 15:08:
> I see two ways to get a release out: create a branch from the current
> master and remove from it what we don't consider stable (or 'right' for
> that release), or merge the most important and easily mergeable changes
> over to the current release branch for 0.15.1 and leave the rest to a
> not-so-far-in-the future 0.16.
>
> Personally, I vote for the latter, because I think we should rather try to
> get 0.16 out soon and not put too much work into 0.15.1.

I selected the list of changes that I considered safe and important, and 
transplanted them into the release branch.

Please check if there is anything missing that's should go into a bug fix 
release.

Stefan