LUCENE-5731: split out direct packed ints from in-ram ones

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1600412 13f79535-47bb-0310-9956-ffa450edef68
Add svn:ignore __pycache__ to dev-tools/scripts

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1600431 13f79535-47bb-0310-9956-ffa450edef68