Update README.md
Update ansible to 1.6.3
Merge pull request #286 from jcftang/wip-update-ansible

Update ansible to 1.6.3
Sphinx should be a distutils package

setuptools installs an extra tests folder which breaks some profiles.
Add pkg-config dependency

matplotlib uses pkg-config to detect dependencies (freetype).
Merge pull request #288 from kajiglet/patch-1

Add pkg-config dependency to matplotlib