message: Updated the changelog (we can put more once the class names are established).
diff: Development version 3.3.1, not released
  =======================================
  +- Added a mesh optimization miniapp, Mesh Optimizer, that is based on the target
  + matrix optimization paradigm (TMOP). It is supported by a set of classes that
  + represent mesh quality metrics, their first and second derivatives.
  +
  - Added SUNDIALS version of example 16/16p.
  - Added optional support for the STRUMPACK parallel sparse direct solver and
  