TST: get travis working on Py26 and Py27

I had to rely on conda for Py26. Waiting for wheels for later

TST: try to get Py2.6 on travis

TST: use conda for python 2.6

Fix bug in .travis.yml

Fix .travis.yml

TST: Try to fix travis

TST: fix travis on 2.7
TST: Add Python 3.3 to travis
Merge pull request #2767 from GaelVaroquaux/my_master

TST: get travis working on Py26 and Py27
DOC fix documentation to match default value
ENH remove unnecessary CSR->CSC transform in text feature extractors
python 3 compatibility fix
added howaboutwe testimonial
Merge pull request #2772 from jnothman/tfidf_no_copy

[MRG] ENH remove unnecessary CSR->CSC transform in text feature extractors
ENH: MultiTaskElasticNet (and Lasso) CV
DOC make indifferent to compressed sparse orientation
Fix some typos in whats_new.rst, using ispell
DOC add link to module reference from class/function pages
Merge pull request #2779 from jnothman/ref_sec_link

[MRG] DOC add link to module reference from class/function pages
Update plot_digits_pipe.py

Import statements have been moved to the top of the file.
Merge pull request #2780 from ugurthemaster/patch-1

Update plot_digits_pipe.py
DOC: some underlines were too short
FIX: Typo
FIX: Typo
Merge pull request #2781 from blagarde/patch-1

FIX: Typo
Merge pull request #2782 from blagarde/patch-2

FIX: Typo