fields are now optional
solrResource.moreLikeThis === recommend
- solrResourceFactory were greatly refactored: solr actions and publish partial mappings are now kind of generalized.
- consoleLogger factored out.
- https://github.com/ifroz/jstk is used.
lib/index.js wraps the two factories into yet another factory,  which returns { getResource(options), getQueue([queueName,] resourceOrOptions: }.
v0.0.3