Manylinux2010

An attempt to build manylinux2010 compliant wheels for python versions 2.7, 3.5, 3.6, and 3.7

This PR creates a new docker image based on the manylinux2010 image provided by the Python Packaging Authority and a simple bash script for building the wheels inside it. With better knowledge of cmake, there could be a more elegant solution.

As a future improvement the wheels should be tested in a separate docker container.