LUCENE-5735: number/date range faceting on NumberRangePrefixTreeStrategy

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1647727 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-6134: fix typos: it's->its, its->it's, etc.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1647735 13f79535-47bb-0310-9956-ffa450edef68