PIG-4325: StackOverflow when spilling InternalCachedBag

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1639198 13f79535-47bb-0310-9956-ffa450edef68
PIG-4328: Upgrade Hive to 0.14

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1639234 13f79535-47bb-0310-9956-ffa450edef68
Add missing License

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1639236 13f79535-47bb-0310-9956-ffa450edef68
PIG-4321: Documentation for 0.14

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1639243 13f79535-47bb-0310-9956-ffa450edef68