message: DOC: log matvecops changes in changelog
diff: @@ -24,6 +24,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  is used extensively for Delaunay triangulations.
  ### Changed
  +- Refactored Axom's Matrix/Vector operators and consolidated them in a single file.
  +- Removed overloaded arithmetic operators from the Matrix class. Using the overloaded operators,
  + albeit convenient, could have undesirable performance side effects, e.g., creation of temp
  + objects when chaining those operators. To avoid confusion and to prevent applications from
  + inadvartently misusing them, the overloaded operators are now removed. Application codes can
  + use the ``matvecops`` methods instead.
  - Quest's STL reader now returns a status code, inidicating whether reading
  the STL file was successful. Also, the reader now leverages the improved
  Mint API to reserve storage for mesh and avoid re-allocations when reading
  