Import error for lena
[ENH] Modifications to image processing tutorial

mostly from Scipy India tutorial (+ PEP 8, etc)
BUG: layout for non-python <pre>
intro/intro.rst: Fix typo

Replace "hello word" with "hello world" in 3 places.
Merge pull request #49 from ozancaglayan/patch-1

intro/intro.rst: Fix typo

Awesome, thanks!
Update intro/language/basic_types.rst

- Fix typo: 'perfom' -> 'perform',
- Cleanup a traceback from its long path to fix layout issues,
- In string substitution, no need to use %03d as it is not explained
  and will confuse beginners,
- In 'bag of Ipython tricks' remove a newline in the first item.
Update intro/language/functions.rst

fix up some long paths,
fix a non-existent function name,
replace brackets by parentheses
replace 'passed by value' with 'passing by value'
Merge pull request #50 from ozancaglayan/patch-2

Update intro/language/basic_types.rst
add Ozan to list of contributors
basic_types.rst: Clearer list comprehensions

This changes the list comprehension example to use color names
instead of plain integers to remove ambiguity for beginners.
The current example is confusing because the list members
are actually shifted list indices.

This is also an attempt to fix #32
Merge pull request #51 from ozancaglayan/patch-3

Update intro/language/functions.rst
Merge pull request #52 from ozancaglayan/patch-4

basic_types.rst: Clearer list comprehensions
Fix indexing error in numpy_indexing visual

The visual had a serious error about array slicing. I found the SVG
from an older scipy tutorial repository and fixed the error. I also
generated a new PNG and replaced the older one.

This is an attempt to fix #29
Merge pull request #53 from ozancaglayan/numpy-indexing-svg-fix

Fix indexing error in numpy_indexing visual
fix trailing whitespace
add new ipython_console_highlighting

The version from:

http://code.google.com/p/pykml/source/browse/docs/sphinxext/ipython_console_highlighting.py?spec=svn5503157a8848914b57b071442d6994dee7314804&r=5503157a8848914b57b071442d6994dee7314804

Supress the warning about setup we get
description of some additional useful ipython tips and tricks
add history to ipython features discussed
Merge branch 'misc'

* misc:
  add new ipython_console_highlighting
  fix trailing whitespace
Merge branch 'upgrade/ipython'

* upgrade/ipython:
  add history to ipython features discussed
  description of some additional useful ipython tips and tricks