Added Int, Short, Float, Double, and Long Serializer Tests
(Re)add TransitiveClosureNaive, fix join, add ITCase

Scala Join took left key selector for both sides of join. Re-enable
union. TransitiveClosureNaive uses union, this is tested in the ITCase.

Properly disable GlobalSchemaGenerator, the information it created has
not been used, only local field positions have been used.
Add tupleType() method to CsvReader that allows to read directly into subclasses of Tuple
Fix CSV reader tests and added comments to CSV reader.
Display Exceptions in the JobManager webinterface
Removed faulty constructor
Remove obsolete Broadcast Variable Join example.
Simplified translation of new Java API
added support for setting the DOP of individual operators
Minor deprecation cleanup and comments.
Add semantic properties to spargel plan.
fix issues #736 and #733
Suggested fix for #739
Allow both comma and double-colon as path separator (for MR compat.); better error messages; delete address file
Adds join projection, comments for join classes, removes unsupported methods for join.
Added unit test for join projection
Extended Join integration test for join projection
All sink methods in DataSet return the DataSink object to allow setting parameters.
Improved error message in PackagedProgram for preview plans.
Fixed pre-packaged end-to-end test.
Add projection cross