dbscan_1.1-0

New Features

• HDBSCAN was added.
• extractFOSC (optimal selection of clusters for HDBSCAN) was added.
• GLOSH outlier score was added.
• hullplot uses now filled polygons as the default.
• hullplot now used PCA if the data has more than 2 dimensions.
• Added NN superclass for kNN and frNN with plot and with adjacencylist().
• Added shared nearest neighbor clustering as sNNclust() and sNN to calculate
  the number of shared nearest neighbors.
• Added pointdensity function.
• Unsorted kNN and frNN can now be sorted using sort().
• kNN and frNN now also accept kNN and frNN objects, respectively. This can
  be used to create a new kNN (frNN) with a reduced k or eps.
• Datasets added: DS3 and moon.

Interface Changes

• Improved interface for dbscan() and optics(): ... it now passed on to frNN.
• OPTICS clustering extraction methods are now called extractDBSCAN and
  extractXi.
• kNN and frNN are now objects with a print function.
• dbscan now also accepts a frNN object as input.
• jpclust and sNNclust now return a list instead of just the
  cluster assignments.