Initial pull request for documentation of fuzzy Allen's Interval Algebra and its usage with PLN

@cosmoharrigan, as announced, this is the initial pull request for my work on the fuzzy implementation of Allen's Interval Algebra in order to use it with PLN. As initial steps, I created a README outlining the conceptualization of the implementation and the usage of its basic classes. Additionally, I created a simple which I'm going to extend gradually along with the README.
I renamed the repository because I felt spatiotemporal elicits wrong expectations concerning its contents, i.e. of the contents pertaining both to spatial and to temporal reasoning. I'm going to work on this and push further commits in this pull request. In the process, I welcome any suggestion that you'd offer. Also, @keyvan-m-sadeghi, if you have any remarks, just chime in.