3.5.1

• Upgrade to Apache Lucene 5.5.1
• Add support for old dummy column syntax (Spark compatibility and score retrieval)
• Add option to use doc values in match, contains and range searches
• Add heuristic to build token range queries according to their selectivity
• Add transformation for getting the convex hull of a geographical shape
• Add early termination in inner pagination (improves allow filtering performance)
• Remove indexed/sorted mapping options, all mappers store doc values when possible
• Fix invalid WKT shapes by zero-buffering them
• Fix memory consumption issues with high fetch sizes
• Fix clustering key filtering with better token prefix collation
• Fix deletion of unique component of a collection (#132)