Pig 0.14.0 Release

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1640861 13f79535-47bb-0310-9956-ffa450edef68
PIG-4342: Pig 0.14 cannot identify the uppercase of DECLARE and DEFAULT

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1641494 13f79535-47bb-0310-9956-ffa450edef68