message: Added a note about the the vertex welding function to the CHANGELOG.
  Misc: Also made some minor changes to some CHANGELOG entries.
diff: @@ -7,10 +7,16 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  ## [Unreleased]
  ### Added
  -- Refactor and clean up the Primal's Sphere class, add a sphere-sphere intersection test and
  - associated unit test.
  -
  +- Added a sphere-sphere intersection test and associated unit test.
  +- 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.
  +### Changed
  +- Refactored and cleaned up Primal's Sphere class.
  -
  ## [0.2.9] - 2017-03-08
  @@ -33,9 +39,6 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  If such a cell exists, it also finds the isoparametric coordinates of the
  point with respect to the cell. The query supports higher order
  [mfem](http://mfem.org) meshes.
  -- Adds a bounded All-Nearest-Neighbor query to Quest. This query takes a list
  - of points locations and regions, and for each point reports the nearest point
  - in a different region that is no farther than a max search radius.
  - Added cross-product and linspace operators to the vector utilities in ``numerics``
  ### Changed
  