Fixed kryo to properly instantiate with the correct classloader
Fixed DOP of dummy nodes for schema minimalization
Fixed iteration with an additional post pass of the nephele job graph
Merge branch 'master' of https://github.com/AHeise/stratosphere-sopremo
Fixed schema pruning for iterations
Merge branch 'master' of https://github.com/AHeise/stratosphere-sopremo

Conflicts:
	sopremo/sopremo-common/src/main/java/eu/stratosphere/sopremo/serialization/SopremoRecord.java