another speedup attempt for index.html: carousel images to use thumbnails instead, 1 blocking js removed for page (sidebar.js)
cleanup changes
remove paren
add lossless image compression for docbuilding machine
switch species_kde to thumbnail
logo lossless compressions
add coverage test for travis
coverall added
remove whitespace, fix pip install
FIX scipy API
... add the fix to import check
Merge pull request #2497 from dengemann/extend_fast_dot

FIX: support older scipy API for fast_dot
AdaBoostRegressor: fix redundant recalculation of error_vect.max()
Merge pull request #2500 from ndawe/r2

[MRG] AdaBoostRegressor: fix redundant recalculation of error_vect.max()
Merge pull request #2495 from jaquesgrobler/ENH_coverage_travis

add coverage test for travis
ENH: Call plot twice per class label rather than for every point.
ENH: remove offset calculations
ENH: use memset and memcpy when possible
ENH: make sort an inline nogil function
ENH: make node_reset/split/value gil-free