reimport HTML in different section

Explicitely reimport HTML from IPython.display when we change section
avoid references to fiel out of directory

request for packaging, it would be nice for example not to reference
files outside of exampel directory
copy ../../_static/logo.png in logo/logo.png
use subfolder for demo purpose of targetting subfolder in
demo notebook
Merge pull request #3060 from Carreau/fix-ex.0.13.x

Fix Exampel for 0.13.x
Backport PR #2224: fix css typo

fix css typo, missing `:` and `margin :`
note latest backports
Backport PR #3097: PyQt 4.10: use self._document = self.document()

in PygmentsHighlighter, required for PyQt 4.10 compatibility.

closes #3084

I have tested this on all my machines with earlier PyQt and PySide, and it doesn't break anything.  I don't have any truly old versions of PyQt, though.

see [PyQt list](http://www.riverbankcomputing.com/pipermail/pyqt/2013-March/032512.html) for details.
Backport PR #3117: propagate automagic change to shell

Automagic toggling was broken.

this should fix it. Need to check for backport on 0.13.x
Backport PR #3118: don't give up on weird os names

like java

closes #3113
update whatsnew
0.13.2 rc2
only upload sdists (backported from master)
fix dot syntax error in inheritance diagram
add release date
release 0.13.2