Fix for:
[error] /home/travis/build/twitter/scalding/scalding-core/src/test/scala/com/twitter/scalding/PartitionSourceTest.scala:43: not found: value ???
14/05/01 23:31:51 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
[error] def toTuple(partition: String, tupleEntry: TupleEntry): Unit = ???