Updated name in modules list
MSTCluster -> SingleLinkageCluster.
All tests passing
Updates to documentation
Hanging MST reference
Merge branch 'eac' of github.com:robertlayton/scikit-learn into eac

Conflicts:
	doc/modules/clustering.rst
	examples/cluster/plot_eac.py
	sklearn/cluster/__init__.py
	sklearn/cluster/eac.py
Docs build correctly now