Merge pull request #461 from StephanEwen/iters

Fixed several bugs related to AllReduce and Iterations.
stratosphere debian package fixes
deploy spargel with dist
MatchNode UnsupportedOperationException fix
Add WordCount example with anonymous classes (for discussion)
Provide Iterable instead of Iterator to updateVertex method of Spargel API (issue #425)
Remove non-sensical comment from SpargelConnectedComponents (issue #428)
Add SpargelConnectedComponentsITCase to Spargel module
Extend ConnectedComponentsITCase instead of code duplication for SpargelConnectedComponentsITCase
provide MessageIterator instead of Iterable
Changed CsvOutputFormat constructor to support additional arguments
removed some empty lines
create parallel collections and add java value to stratosphere value interface
add Unit-test to check format and change some code styles
Part A.1
some minor cleanups
fix CsvOutputFormatTest (and re-introduced a flag for constructor-based instantiation
add classloader to thread-global variable; introduce compiletime-typesafety for Hadoop Wrapper Types
rename hadoop-compatibility,
more generics
Extended avro serialization test.