Lucene 4.6 Release Highlights: * Added support for NumericDocValues field updates (without re-indexing the document) through IndexWriter.updateNumericDocValue(Term, String, Long). * New FreeTextSuggester can predict the next word using a simple ngram language model useful for "long tail" suggestions. * A new expression module allows for customized ranking with script-like syntax. * A new DirectDocValuesFormat can hold all doc values in heap as uncompressed java native arrays. * Term.hasFreqs can now determine if a given field indexed per-doc term frequencies. * Various bugfixes and optimizations since the 4.5.1 release.
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