* helm-buffers.el (helm-buffers-list--match-fn): Add filename matching to *buffers-list (#532).
Renamed from helm-buffer-match-major-mode.
* helm-buffers.el (helm-buffers-list--match-fn): Fix typo (#532).
* helm-buffers.el (helm-buffers-list--match-fn): Fix some clauses that was noop.
* helm-help.el: Document new buffer matching feature.
* helm-buffers.el (helm-buffers-list--match-fn): Matching only on directory name is better.
* helm-help.el: Document it.
* helm-buffers.el (helm-buffers-list--match-fn): Allow matching inside after matching on fname.