* helm-mode.el (helm-comp-read): Allow adding a transformer to hist source.
Use helm-source for source history.
* helm-command.el: Use it.
* helm-mode.el (helm-comp-read): Use helm-source to build src and src1.
* helm-source.el: Indent 1 in build macros.
* helm-mode.el: Reindent.
* helm-command.el: Don't sort history candidates.
* helm-mode.el: Bind M-RET for emacs-nw (#686).
* helm-help.el: Document mode-line.
Update labels for helm-buffers actions
Merge pull request #688 from tuhdo/exp

Update labels for helm-buffers actions
* helm-files.el (helm-find-files-map): Bind ediff-merge to M-= to fit with buffers.
Merge branch 'exp'
* helm-source.el: Add bindings to actions names.
* helm-ring.el (helm-execute-kmacro): New (#685).
* helm-ring.el (helm-execute-kmacro): Fix persistent message.