PIG-3161: Update reserved keywords in Pig docs (russell.jurney via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1447113 13f79535-47bb-0310-9956-ffa450edef68
PIG-2553: Pig shouldn't allow attempts to write multiple relations into same directory (prkommireddi via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1447118 13f79535-47bb-0310-9956-ffa450edef68
PIG-2553: Pig shouldn't allow attempts to write multiple relations into same directory - Forgot to add admin.xml


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1447120 13f79535-47bb-0310-9956-ffa450edef68
PIG-3158: Errors in the document "Control Structures" (miyakawataku via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1447124 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of https://github.com/apache/pig into trunk