* Do not add duplicate information from PHP to phpdoc. * Do not add useless comments like "this is a constructor of class x".
+ Updated version pointer + Replaces deprecated ArrayUtility for Core utility
Use own service to handle data processing. Classes like indexer should not know anything about the structure and how to process the data. Also rename record to data, as we can process just any data in form of an array. Relates: #116
Document data processors. Add test for new data processor.