(helm-ls-git-status-command): Now defcustom.
(helm-ls-git-list-files): Use now directly helm-ls-git-root-dir.
(helm-ls-git-root-dir): Finally use `locate-dominating-file'.
(helm-ls-git-transformer): Use now helm-default-directory.
(helm-ls-git-ls): Rebind helm-default-directory for when called from lisp.
(helm-ls-git-ff-dir-git-p): Renamed from helm-ls-git-root-p.