CHANGES IN GEIGER
2013-04-31
  * adding print functions for classes gfit and gfits
  * allowing bm.lik to use nodes (i.e., fossil data) argument
  * allowing mkn.lik to use root arguments
  * optimized and parallelized fitContinuous and fitDiscrete
  * removing vcv.phylo
  * adding ratematrix for evolutionary rates matrix function
  * changed transform.phylo to rescale.phylo to prevent corruption of generic transform
  * changed vcv(phy, dat) to ratematrix
  * updated sim.char
  * permitting rescale to return 'model' trees

2013-04-11
  * released geiger 1.99-3 to CRAN
  * adding drop.extinct.taxa and drop.random.taxa to maintain previous functions
  * adding better support for parallel:::mclapply
  * adding coef and logLik methods for fitContinuous and fitDiscrete

2013-04-06
  * released geiger 1.99-2 to CRAN
  * some details of updates can be found here:

     Pennell, M.W.*, J.M. Eastman*, G.J. Slater, J.W. Brown, J.C. Uyeda, R.G. FitzJohn,
     M.E. Alfaro, and L.J. Harmon. (2014) geiger v2.0: an expanded suite of methods for
     fitting macroevolutionary models to phylogenetic trees. Bioinformatics 15:2216-2218.

     http://bioinformatics.oxfordjournals.org/content/30/15/2216

2014-11-13
  * updated geiger 2.0.4, now passes travis-CI checks

2017-10-17
  * fixed bug in MDI p-value calculations thanks to tip from Graham Slater