LUCENE-5218: add CHANGES

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_5@1526575 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5245: backport to lucene_4_5


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_5@1526581 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5233: tweak demo example search string to something that isn't in the code base (merge r1526248)


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_5@1526585 13f79535-47bb-0310-9956-ffa450edef68