Readability ported to C. 100x faster than JS.

Nice catch :-)! Since I closed the project I mentioned in that comment, I wanted to release some parts of the code. The article about Readability reminded me of it, mostly because some of the comments suggested that a lot of people were rewriting Readability using Python and lxml. This part of the code was mostly clean and well tested, so this morning I spent half an hour writing the README and pushed the code to github.