PIG-3650: Fix for PIG-3100 breaks column pruning

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1556374 13f79535-47bb-0310-9956-ffa450edef68
PIG-3649: POPartialAgg incorrectly calculates size reduction when multiple values aggregated

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1556387 13f79535-47bb-0310-9956-ffa450edef68
PIG-3617: problem with temp file deletion in MAPREDUCE operator (nezihyigitbasi via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1556685 13f79535-47bb-0310-9956-ffa450edef68
PIG-3657: New partition filter extractor fails with NPE (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1556906 13f79535-47bb-0310-9956-ffa450edef68
PIG-3653: Add support for pre-deployed jars

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1556931 13f79535-47bb-0310-9956-ffa450edef68
PIG-3662: Static loadcaster in BinStorage can cause exception (lbendig via rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1557288 13f79535-47bb-0310-9956-ffa450edef68
PIG-3642-4