Query Parser example: add some inline comments

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1444699 13f79535-47bb-0310-9956-ffa450edef68
InMemory: make AllowedObjectChildIds unorderable

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1444700 13f79535-47bb-0310-9956-ffa450edef68