less version scipy install and doc why we use version 0.8.
print more info about the VM that is testing our code.
Change the PART to have only one that need SciPy and install it only for this PART.

This speed up the test time of the other part.
Quote the command to try to make travis-ci parse our script.
change the travis-ci tests split to equilibrate it more.
Make .travis.yml pass travis-lint
Merge pull request #1263 from nouiz/travis-ci-scipy

Travis ci scipy
Fix the new march=native on windows.
better err message.
Remove /dev/null as it is not supported on windows and there is a work around elsewhere for that.
Always use stdin=devnull when calling Popen.