An encoder and decoder for the format described in [http://www.ietf.org/rfc/rfc3284.txt RFC 3284]: "The VCDIFF Generic Differencing and Compression Data Format." The encoding strategy is largely based on [http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.11.8470&rep=rep1&type=pdf Bentley-McI...