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
Simplified Java API by removing unnecessary project methods
Removed group sorting for pair-wise Reduce function
added license headers
Added aggregators and convergence criterion to new Java API.
Better generics support for Aggregators
Lots of comments.
Added convenience convergence criterion classes.
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)