PIG-3090: Introduce a syntax to be able to easily refer to the previously defined relation (jcoveney)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1437229 13f79535-47bb-0310-9956-ffa450edef68
PIG-3078: Make a UDF that, given a string, returns just the columns prefixed by that string (jcoveney)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1437235 13f79535-47bb-0310-9956-ffa450edef68
PIG-3091: Make schema, header and stats file configurable in JsonMetadata (pkommireddi via jcoveney)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1437242 13f79535-47bb-0310-9956-ffa450edef68
PIG-3086 Allow A Prefix To Be Added To URIs In PigUnit Tests


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1437635 13f79535-47bb-0310-9956-ffa450edef68
PIG-3124:  Push FLATTENs After FILTERs If Possible

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1437765 13f79535-47bb-0310-9956-ffa450edef68
PIG-3082: outputSchema of a UDF allows two usages when describing a Tuple schema (jcoveney)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1437794 13f79535-47bb-0310-9956-ffa450edef68
PIG-3073: POUserFunc creating log spam for large scripts (jcoveney)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1437796 13f79535-47bb-0310-9956-ffa450edef68
PIG-3109: Missing license headers (jarcec via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1438240 13f79535-47bb-0310-9956-ffa450edef68
PIG-3031: Update Pig to use a newer version of joda-time (zjshen via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1438273 13f79535-47bb-0310-9956-ffa450edef68
PIG-2645 PigSplit does not handle the case where SerializationFactory returns null


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1438648 13f79535-47bb-0310-9956-ffa450edef68
merge