SOLR-4926: get latest commit from deletion policy

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1497054 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4921: fix eol-style on new files

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1497057 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4916: Add support to write and read Solr index files and transaction log files to and from HDFS.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1497072 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4965: skip IW.commit if no changes

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1497075 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5061: Add License to prettify.js files. NOTICE.txt is already fine

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1497086 13f79535-47bb-0310-9956-ffa450edef68