More performance

Better performance
Fixes for Robust Single Linkage
Faster cluster extraction from trees
New Notebooks

Faster!

Further optimization of routines that became bottlenecks due to the new faster minimum spanning tree algorithm. Reworking the calling of query on trees to optimize core distance computation in higher dimensional spaces.

0.4.2

Bug fixes for pip installing 0.4

0.4

New algorithms bring dramatic speed improvements, particularly for low dimensional data.

0.3: Update README.rst

Support low memory; Robust single linkage.

Development release 0.1

Remove unused import