1.0.0: Probabilistic minimal commmon regions.
      Plot for the genome (genome.plot).
0.5.: Bug fix in summary.RJaCGH (thanks to Douglas Grove).
0.5:  Automatic labelling of states
0.4-3: Functions can take distance, not just position
       Added preprint to inst/doc
0.4-2: Now collapseChain recovers loglik and probs within model. Changed
       slightly prior for mu.
0.4-1: Fixed bug in plots that smooth arbitrarily too much in density plots
0.4:   Fixed Windows crash (order of evaluation issue in Combine and Split).
0.3-1: Use Calloc instead of R_alloc to try drive down memory usage.
       Played with interrupts.
0.3:   nnhl.cpp re-written as C (instead of C++) to try prevent crash under 
       Windows.
0.2:   Real Posterior probabilities of the sequence of hidden states via viterbi
