Add a description to what the design patterns are and what they try to achieve

[Venthe]

[JC-85]

@Venthe I think it would be good if there was a README.md to go together with each example. That way you could get a idea of what the pattern is supposed to accomplish before diving into the code.

Are you taking pull-requests? I´d be up for expanding on the singleton example.

[Venthe]

I sure do; though I think that it should be in code. What do you think?

[JC-85]

I think the implementation should be commented through-out with explanations on each step. You could also preface every class with a description of its purpose. But each pattern should also be accompanied by an explanation of the theory behind the pattern. I got a pull request ready with how I would mange it, but feel free to reject it if it doesn't fit your taste.