A rough, but working dendrogram prototype
Integrate dendrogram into main page.  WIP
Attempt to colour dendrogram labels.  Needs work...
Remove unused css
Make the options panel prettier
Fix test code
Make it possible to select the method for clustering
Speed up distance matrix calculation since it's symmetric
Partially working radial dendrogram.  Ugly, needs refactoring
Update gitignore
Basic tree tooltip
Fix radial dendrogram
Make the dendrogram type an option
Prepare the MDS worker to allow other types of methods
Add zoom/pan to dendrogram
Allow loading of arbitrarily named "pan." files
Merge branch 'master' into dendrogram
Factor out sizing of mds scatterplot
Tweak layout
Refactor dendrogram leaf attributes and fix colouring