hadoopcompatibility: Implementations of basic programming interfaces and a basic driver.

* wrappers for Mapper, Reducer and Combiner (as a local Reducer) on the new Java API
* wrapper for OutputCollector
* wrappers for Partitioner, values comparator.
* a driver making it posible to run unmonitored (so far)  Hadoop jobs on Flink.
* tests and variations of the WordCount driver exclusively in Hadoop.

Conflicts:
	stratosphere-addons/hadoop-compatibility/src/main/java/eu/stratosphere/hadoopcompatibility/mapred/HadoopInputFormat.java
	stratosphere-addons/hadoop-compatibility/src/main/java/eu/stratosphere/hadoopcompatibility/mapred/HadoopOutputFormat.java
	stratosphere-addons/hadoop-compatibility/src/main/java/eu/stratosphere/hadoopcompatibility/mapred/record/HadoopRecordInputFormat.java
	stratosphere-addons/hadoop-compatibility/src/main/java/eu/stratosphere/hadoopcompatibility/mapred/record/HadoopRecordOutputFormat.java
	stratosphere-compiler/src/main/java/eu/stratosphere/compiler/NonCachingDataStatistics.java