Initial work on agglomerative clustering.
Cluster initialisation now works.
Refined merging of root clusters.
Agglomeration now works.
Added different linkages.
Fixed function prototype.
Added readme.
Code cleanup and improvement.
Clean up and improvement.
Added facility to extract k clusters.
Cleanup and refactoring.
Fixed missing functions.
Fixed memory leaks.
Fixed bug when finding nearest neighbour.
Fixed missing new line.
Added comment.
Improved the readme file.
Minor change.
Fixed bug when extracting k clusters.
Improved extraction of k clusters.