Quick HyperVolume Implementation (including parallel and exclusive versions)

Quick HyperVolume Implementations, including parallel versions and the exclusive version. Quick HyperVolume is an algorithm that computes the HyperVolume occupied by a set of hyper-rectangles, that share the "lower leftmost" vertex. A full description of the non-parallel and non-exclusive algorithm is published in IEEE Transactions on Evolutionary Computation (http://dx.doi.org/10.1109/TEVC.2013.2281525). The parallel and exclusive extension is published in Journal of Heuristics (http://dx.doi.org/10.1007/s10732-016-9309-6).