pointers moved to special class
optional proximity matrix storing, allowed easier extension of HAC
lance williams update coefficients for single and complete linkage
testing lance-williams updated formula
Merge remote-tracking branch 'upstream/master'
testing lance williams on Kumar's data
has method for Matrix
has method implementation
dmatrix has implementation
trying caching distances
[api change] using same convention as AttributeBuilder: create and build methods
implemented build and create methods
fixed usage of create and build
fixed bug in wellmap mapping
debugging update formula
Merge remote-tracking branch 'upstream/master'
Simple KNN algorithm