enhanced (hopefully) DBScan documentation; killed some whitespace along the way...
Merge remote-tracking branch 'upstream/master' into dbscan-doc-enh
DOC copy comment describing hierarchical clustering children
Merge pull request #2076 from pprett/dbscan-doc-enh

MRG: Dbscan doc enh
FIX don't rely on Bunch behavior with fetch_covtype

For consistency with new documentation
(176c9cee0805adfd61891e192ae47a55a8628a5f).

Still returns Bunch so as not to break third-party scripts.
DOC much more readable formula in chi2 kernel doc
Remove invalid todo comment
Merge pull request #2080 from ahojnnes/dist-todo

Remove invalid todo comment