[FLINK-1047] Fixes main class for start-local.bat
[FLINK-1048] Swallow output of SET statements in ./bin/flink.bat
[FLINK-1051] ./bin/start-local.bat prints error message if java.exe cannot be found
Another fix for CDH4 compliance
Adjusted examples packaging to only create jars for fully self-contained examples.
[FLINK-1053] Add "mapPartition" operator.
[FLINK-1053] Cleanup implementation of mapPartition function

This closes #42
Small bug fixes for running hadoop output formats

This closes #75
Run tests in parallel

This uses the forkCount parameter of surefire/failsafe. This also
changes the JVM memory size for the testing VMs so that more can fit
into memory.

For this to work, NepheleMiniCluster must recognize when it is run in
a parallel testing environment and change ports accordingly. Also
AbstractTestBase and TaskTestBase must prefix temp files with the class
name to prevent name clashes.