* helm-source.el (helm-source): New slot :fuzzy-match.
* helm.el (helm-fuzzy-match, helm-fuzzy-search): new fns.
Move helm--mapconcat-candidate to helm.el.
* helm.el (helm-fuzzy-search): Fix use pattern as arg.
* helm-source.el: Update docstrings.
* helm.el (helm-fuzzy-search): Add FIXME comment.
* helm-source.el: Fix setting of :search slot.
* helm.el (helm-fuzzy-search): Attempt to fix negation, still broken though.
* helm-match-plugin.el: Add comment.