Add argument to allow setting base directory for docker daemon's storage to values other than "/var/lib/docker".
Added Swipely's `docker-api` gem to the table of Remote API Client
Libraries.
Merge pull request #1018 from nahiluhmot/add-swipely-docker-gem

* Documentation: Added Swipely's `docker-api` gem to the table of Remote API Client Libraries.
Merge branch 'add-daemon-storage-path-param' of https://github.com/heavenlyhash/docker into heavenlyhash-add-daemon-storage-path-param