** Completely rewritten **
MetaCPAN::API has been completely rewritten as MetaCPAN::Client.
Other than the different name (to match MetaCPAN itself), the
following changes had been made:
* MetaCPAN::Client is officially part of MetaCPAN
* Semantic Versioning (semver) scheme
* Moo as object system
* All entities are now objects
* Using Elasticsearch.pm for complex queries
* Rich syntax for nested queries (AND/OR)
* Simple queries return entity objects
* Complex queries return resultset objects (with iterator)
* Support for scrolled searches
* Inline support for ElasticSearch facets
* Documentation, tests - all cleaned, rewritten