PIG-2433: Jython import module not working if module path is in classpath

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1430649 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-3131: Document PluckTuple UDF (rjurney via jcoveney)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1447712 13f79535-47bb-0310-9956-ffa450edef68
PIG-3060: FLATTEN in nested foreach fails when the input contains an empty bag

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1465702 13f79535-47bb-0310-9956-ffa450edef68
PIG-2767: Pig creates wrong schema after dereferencing nested tuple fields

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1470697 13f79535-47bb-0310-9956-ffa450edef68
PIG-2970: Nested foreach getting incorrect schema when having unrelated inner query

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1478243 13f79535-47bb-0310-9956-ffa450edef68