* helm-source.el: Handle error in *source-dummy
setup method.
Clarify helm-moccur usage in demo
Merge pull request #613 from tuhdo/master

Clarify helm-moccur usage in demo
* helm-elisp.el: Enable sorting in apropos.
Use helm-build* functions to build source in apropos functions.
* helm-source.el: Rename helm--make* to helm-make.
* helm-bookmark.el: same.
* helm-buffers.el: same.
* helm-regexp.el: same.
* helm-sys.el: Display column line and give it properties.
(helm-top-columns): new face.
(helm-top-transformer): propertize this line.
(helm-top-sort-transformer): It seems it is not needed to check the cdr
and return butlast of this list, just returns this list.
* README.md: Add a note of problems installing from (m)elpa.
* doc/Home.mdpp: Add note about upgrading helm.
Merge branch 'master' into exp
* helm-utils.el: Fix (#618).
(helm-quit-and-find-file): Check bmk before file.
* doc/Home.mdpp: Add note in FAQ about fixing package.el bug with async.
* doc/Home.mdpp: Fix typo.
* helm-bookmark.el: Fix typo in address-book source.