[runtime] CaseClassSerializer correctly treated as stateful
[scala] Fix slow building of adjacency list in Scala PageRank
Rewrite TPC-H Q3 to use Long instead of Integer

Both Java and Scala version fixed.
[scala] Add equals() to TraversableTypeInfo
Removed TypeSerializerFactory from ScalaCsvInputFormat. The TypeSerializer is now serialized directly.
[FLINK-1270] [APIs] FS.get() supports relative paths

This closes #224
[FLINK-1095] [clients] Remove '-d' option in info from CliFrontend

This closes #238
[FLINK-1273] [runtime] Add Void type to basic types

Add optional test for external sorting of case classes.
Fix various warnings.
Upgraded HBase addon to HBase 0.98.x and new Tuple APIs
[FLINK-1290] Fix Optimizer to create plans when encountering incompatible partitionings.
[scala] [runtime] Add extra tests for sorting of case classes
[FLINK-1245] Introduce TypeHints for Java API operators