Initial pre-release

Initial pre-release of the XCS (Accuracy-based Classifier Systems) library. The code is mostly untested and some functionality is only partially implemented. However, it does run successfully in an end-to-end testing scenario on the author's system (Anaconda 3.4 on Windows 8) and should be immediately usable to anyone wanting to explore the XCS algorithm.

The package has been made available as a wheel on pypi and can be installed with pip using the command pip install xcs. It can also be downloaded directly from the python package index.