Changes in version 0.2.0.00                       

  - New boundary parameter for scl_redcap() and scl_full(): spatial
    neighbours are taken from a constrained Delaunay triangulation
    within the boundary of the study region (via the 'cdtr' package), so
    that no neighbour edges cross outside it (#5).
  - Allow 'dmat' to be long-form as well as square (#8)
  - Finish main vignette
  - Fix shortest parameter behaviour for scl_full() and scl_redcap():
    initial clusters are always formed from spatially nearest
    neighbours, and shortest determines only how clusters are then
    merged (#28).
  - scl_full() no longer collapses to single shortest edges when
    shortest = FALSE (#28).
  - Document return value of scl_full() and add example for
    plot_merges().
  - Refactor long functions (plot.scl(), scl_full(), scl_redcap()) into
    smaller internal helpers; no change in behaviour.