MAINT ignore profiling results from kernprof.py
fix: newest numpy doesn't like all-indexing non-existing dimension (reported by erg #2233)
ENH remove bad examples
DOC let some example for prf metrics
Merge remote-tracking branch 'upstream/master'
FIX: Newer numpy causes scipy to issue a DeprecationWarning. Ignore it. Fixes #2234.
ENH: add single_linkage
ENH: single linkage with Cython

Faster thanks to a binding of the C++ map container to replace Python
dictionaries
ENH: speed up single linkage
ENH: start of complete linkage
ENH: first sketch of weighted linkage
BUG: fix bug introduced in Ward
ENH: add average linkage
BUG: remove debug print
WIP: MST for single linkage
Cosmit
MISC: refactor Ward and linkage in same object
ENH: hierarchical clustering example
DOC: nice hierarchical clustering example
API: rename to agglomerative clustering