Revert "Removes DigitalOcean while API/plugin are broken"

This reverts commit d762983a3d683b1bfe28784980418b9aadaa868e.
Added Apache Solr support.
Merge branch 'solr' of https://github.com/RoSk0/puphpet into RoSk0-solr
Updates PR to new structure; #1216
Brings Solr up to spec; Adds port/version choice; #1216
Merge branch 'RoSk0-solr'