ported CompactingHashTable + unit tests to current master
integrated CompactingHashTable in iterations code
cleanup + documentation
intermediate (new hashtable and broken joinwithsolutionset*driver)
cogroup fixed
match fixed but ConnectedComponentsWithDeferredUpdateITCase still fails
ConnectedComponentsWithDeferredUpdateITCase green
added test case with multiple probers
Java 6 compliance
added license headers
Merge branch 'integration' of https://github.com/rwaury/stratosphere into hash_merge
Merge branch 'ozone_master' into hash_merge
Minor example cleanups.
Add/rework utility iterators.
Minor cleanup in local collection output format, csv reader, program description.
Removed redundant WordCount examples.
Fix various serialization warnings.
Postprocess the compacting hash table merge
Add new java api based delta iteration example.
Reorganize ConectedComponents example based tests.
Add test for StringSerializer for #589