Build and Distribute Python Wheel

[daniel-j-h]

Splitting off from @kenzierocks' initial Python packaging pull request #51 (please read for context).

At the moment we require users to compile, link, and install libsweep.so before they can install the Python bindings. It would be great if we no longer require these steps. Instead users should only have to

pip install sweep

and get everything pre-built, packaged and set up for their platform.

This requires us to build Python Wheels for Linux, macOS and Windows (if we want to support pre-built binaries for all of them). Which can be done but is a bit cumbersome.

I can think of a solution where we (at least for Linux) spawn up a Docker container and let Travis build and publish binaries for master automatically.

Please read the initial Python packaging pull request summarizes what needs to be done: #51.

Note: this is on the wish-list but certainly not prioritized right now. Feel free to jump in and help out here.