PIG-3525: PigStats.get() and ScriptState.get() shouldn't return MR-specific objects (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1543058 13f79535-47bb-0310-9956-ffa450edef68
PIG-3580: MIN, MAX and AVG functions for BigDecimal and BigInteger (harichinnan via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1543094 13f79535-47bb-0310-9956-ffa450edef68
PIG-3576: NPE due to PIG-3549 when job never gets submitted (lbendig via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1543100 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk into tez branch


git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1543105 13f79535-47bb-0310-9956-ffa450edef68