CRUNCH-451: Fix error messages for Scrunch's ReverseJoinStrategy
CRUNCH-452: Add real Thrift dependency for Scrunch.
CRUNCH-449: Add a new PipelineCallable and sequentialDo method
for inserting non-Crunch tasks into Crunch workflows.
CRUNCH-456 Abbreviate long node names in dot file

Abbreviate node names down to 300 characters in job plan dot files
to ensure that the output dot files are both valid and readable.
CRUNCH-457 Change hadoop-client to provide scope
Change usage of Iterable in PGroupedTable to TraversableOnce/Iterator to prevent SingleUseIterator exceptions in Scrunch

Signed-off-by: Josh Wills <jwills@apache.org>
CRUNCH-459: Allowing nulls as values in Avro PTableTypes