fix converting an array with ndim > 0 to an index DeprecationWarning
using floor division in python3
handle the case when length of sign changed coefficients is greater than 1 in LARS algorithm
Merge remote-tracking branch 'upstream/master' into fix-DeprecationWarning
handle the case where length of idx in least_angle greater than one
Merge pull request #2797 from cli248/fix-DeprecationWarning

Fix deprecation warning in Python 3