ENH better spacing on the first page
ENH testimonials img are now centered.

More spacing around button
FIX typo in testimonials

Thanks @jaquesgrobler
Polishing on "Who's using scikit-learn"
DOC: layout tweaks
DOC: bigger menu fonts
ENH more explicit name for auc + consistency for scorer, fix #2096
DOC put the narrative documentation of roc_curve and roc_auc_score in one place
FIX search and replace misstake
Website: bottom buttons
DOC: button layout tweak
Merge pull request #2348 from arjoly/deprecate-auc_score

[MRG] Fix consistency issue between scorer string and metrics function
contributors logos added to index screen footer
changed hyperlink to funding anchor - added same for the images
old footer removed for index page
removed little underscores appearing between images - caused by link added to images
TST: avoid a crash in Windows + Anaconda Py3.3

The crash is due to a numpy bug in np.load, that is called by joblib
caching. We work around it by avoiding the call to np.load
FIX integer types in Ward clustering

Use np.npy_intp, aka np.intp in Python, for all indices.
Also added mode='c' declarations where NumPy would permit
and made some small improvements to the docs and code style.
MISC: fix wrong timing in example
TST: avoid nose running sklearn.test as a test