ENH: Added test cases to ensure the behavior of integer as it is.
There is a need to add test case which ensure and maintain the behaviour
of integer. As per pr #3567, which speed up integer scalar's operations
by avoiding the conversion of integer to NumPy Scalar.
Added test case for size of long based of os
added int test for error raises
Removing test for OS choices on long conventions
DOC: Add NEP and documentation for ufunc overrides.
ENH: Add ufunc override API.
ENH: Add ufunc override functionality to ufuncs and dots.
TST: Add ufunc override tests.
BLD: Added ufunc_override.h to setup.py.
BLD TRAVIS: Added libatlas to travis build so it can test BLAS stuff.

sudo apt-get install -qq libatlas-dev libatlas-base-dev