Update plot_svm_regression.py

library imports have been moved to top of the file.
Update testimonials.rst
adding lovely logo
Add artwork with reference to logos in about.rst

I've seen a lot people using the cutted logo (including wikipedia) from the frontpage while we have a nicer uncut logo (in high quality and vector format) in the doc/logos directory.
Merge pull request #3101 from fabianp/logos

Add artwork with reference to logos in about.rst
DOC Comment on thresholds[0] for roc_curve
BUG: test_lasso_lars_vs_lasso_cd_ill_conditioned

Fix failing jenkings
ENH: Swap rows in sparsefuncs
PY3: fix map usage in ensemble.partial_dependence
COSMIT six.{map,range} usage in partial_dependence
Made the following changes
a] Replaced numpy slicing with concatanate
b] Added swap_sparse_column
DOC advertize GenericUnivariateSelect in the narrative documentation and api
Merge pull request #2936 from ugurthemaster/master

Update plot_svm_regression.py
COSMIT: Replaced ptr1/2 with start/stop
typo
wrap lovely testimonial's paragraph
Merge branch 'pr/3091'
failing test for wrong solver exception
Added raise statement in ridge_regression solver check
FIX raise memory error if constant_feature can't be realloc