ENH: make sure that segfaults always happen

Increase a lot the size of the overflow, to make sure that the memory
lookup falls out of the program memory.
Update advanced/debugging/wiener_filtering.py
fix typo in subplot section

subplot index should be 121 and 122, but was 121 and 112
Merge pull request #46 from arunpersaud/master

fixed a typo in the intro/subplot section
New matplotlib tutorial based on Nicolas Rougier's work
Tweak CSS
ENH: layout
Phrasing
Layout
Add folding TOC
ENH: layout
Update changelog in prep for release
Layout in Mayavi chapter
Typo
Import error for lena
[ENH] Modifications to image processing tutorial

mostly from Scipy India tutorial (+ PEP 8, etc)
ENH: better formatting for code blocks
Formatting
Tweak CSS to work on firefox
BUG: layout for non-python <pre>