Replace k-means clustering with advanced k-means clustering

[adamjtaylor]

For a while, we have internally used an updated k-means clustering add-on for SpectralAnalysis. "Advanced k-means clustering" adds the following

• 5 distance metrics (Squared Euclidean, Manhatttan, Cosine, Correlation and Hamming)
• 3 initial cluster selection parameters (Random, uniform random and preclustered)
• The option of running replicate clustering runs
• Choice of action on empty cluster formation (Error, remove or create new)
• Option for online update phase (On, off)

I have also removed the old k-means clustering addon in this pull request to avoid confusion. The script was originally written by Alex Dexter.

[AlanRace]

Hi Adam, Thanks for your contribution. The latest version of k-means includes some of these, not all, but also includes some new functionality for optionally removing small spatial clusters. Missing are still initial cluster selection, empty cluster formation and online update phase.

Can you update the latest version with these features please?

Thanks,

Alan