message: Updated CHANGELOG regarding boost removal.
diff: @@ -7,17 +7,23 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  ## [Unreleased]
  ### Added
  -- Added a sphere-sphere intersection test and associated unit test.
  +- Added a sphere-sphere intersection test to Primal.
  - Added a utility function to Quest to *weld* vertices in a triangle mesh that are within
  a given tolerance. After welding, all triangles incident in a vertex have the same
  index for that vertex. This function has been integrated into the ``mesh_tester`` utility.
  - Adds a bounded All-Nearest-Neighbor query to Quest. This query takes a list
  of point locations and associated regions, and for each point reports the nearest
  point in a different region that is no farther than a max search radius.
  +- Axom now exports [sparsehash version 2.0.3](https://github.com/sparsehash/sparsehash).
  + Previously, it was only used internally.
  +- Added a BitSet class to Slam.
  ### Changed
  - Refactored and cleaned up Primal's Sphere class.
  -
  +### Removed
  +- Axom no longer depends on the Boost library.
  +
  ## [0.2.9] - 2017-03-08
  ### Added
  