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
Added comments to parsers and improved error handling.
Added static parse methods to parse utility classes.
Added Java 8 to README.md
Moved SerializerTestBase to s-core and resolved Maven dependencies
GroupReduce testcases for the new java api
Minor improvements on GroupReduceITCase (tests for group sorting)
Testcases for cross operator in new java API
Minor improvements of CrossITCase + some clean-up
Mixed key types for cogroup
Fixed mixed keys for CoGroup, adapted test cases, code clean up