Added working speaker notes for slides.
Fixing docs.
Fixing info in trailets.
Fixing names for aliases.
skip tests when display variable is not set
fix failing tests without X in IPython.lib

note that pylab_not_importable appears to not be enough to catch if
we're running X. I'm able to import pylab, and it's only %%matplotlib
magic that causes these tests to die
two column quickhelp dialog, closes #3895

now that quickhelp is a modal dialog, it makes sense to have it be wider
and have the shortcuts take up two columns, instead of one. This change
makes that possible. See the results here:

![new quickhelp css](http://i.imgur.com/nvRTFJm.png)
don't force . relative path, fix #3897

As per #3897, .\filename is not recognized by pdflatex.
Removed references to 0.11 and 0.12 from config/overview.rst
Uniformized prompt to
Merge pull request #3901 from ivanov/fix-3897

don't force . relative path, fix #3897
what's new tweaks

update nbconvert command-line call and add a few links.
Added explicit error message for missing configuration arguments.
explicitly load python mode before IPython mode

ensures IPython mode gets defined at startup,
which can sometimes fail because the Python mode was loaded dynamically.

closes #3636
Merge pull request #3911 from minrk/cm-ipython

explicitly load python mode before IPython mode
noteboook with spaces.ipynb test
updated test for spaces in filename
Merge pull request #3896 from ivanov/fix-3895

two column quickhelp dialog

fits on one page.

closes #3895
use notebook which has an image in it for the test
use grffile to support notebooks with spaces