LUCENE-5116: IW.addIndexes doesn't prune all deleted segments

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1504860 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-4734: Add FastVectorHighlighter support for proximity queries and phrase queries with gaps or overlapping terms.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1504862 13f79535-47bb-0310-9956-ffa450edef68
Fix test bug: IndexWriterConfig was not taken into account.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1504865 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5119: DiskDV SortedDocValues shouldnt hold doc-to-ord in heap

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1504868 13f79535-47bb-0310-9956-ffa450edef68