Extended DataSinkTask to support union input and added corresponding test case and integration test.

Marked transient fields.
Minor formattings.

Combine stubs are lazily initialized upon spilling.
Adjusted combining sorter test cases.

Make the scala schema printers use log4j

Fix the additional syserr appender in LocalExecutor: add a threshold so
that it does only output error messages

Make JobClient use log4j for the event output that was annoying me

Did not correctly generate for key-less reducers.

Threw exception when a copy operator was needed, ignore this for now.

It contains code maintained by the project. (Most of them have a lot of dependencies and are not required by most users)
Move pact-array-datamodel to stratosphere-addons
Move pact-hbase to stratosphere-addons

CsvFormat generic (independent of PactRecord)
Additional parsers.
Examples partially ported to configuration via parameters (rather than confog strings).

This fixes workset iterations, for now
Revert global schema generation stuff to original state but simply
don't use it.

We used the globalPos to create WorksetIteration, these are not
available before the post pass has run, therefore use the localPos for
now.

Properly set key positions in join,cogroup, and reduce from the
local positions.

Also add maxIterations parameter to iterateWithWorkset

Reworked hardware configuration factory.

Minor changes in RemoteExecutor.java and LocalExecutor.java. Removed obsolete null-value check in the finally clauses in LocalExecutor.java. Returning proper exit code in RemoteExecutor.java.