2013-03-25: Ver. 0.1-4
  * Add dmat_* functions/methods to fully utilize pbdR capability, only the
    k-means algorithm is working.
  * Add demo and man for dmat_* methods.

2012-10-21: Ver. 0.1-3
  * Change to apecm and apecma.
  * Switch to pbdMPI.
  * rlecuyer is added.
  * MixSim is added to generate data for simulation.
  * Add load.balance functions.
  * Fix .GlobalEnv problem.
  * Fix .Last.lib problem.

======================== Log Before Release ===================================
2012-02-07:
  * Add K-means, manual, and guide for release.

2012-01-23:
  * Add aecm, apecm1, and apecm2 and part of C code to boost computing.

2012-01-04:
  * Initial the package for release.

2011-09-13:
  * Initial code.