fixed json serialization of null values, fixed bug in output cardinality declaration
unified classpaths in startup-scripts by replacing individual cp's with  from nephele-config.sh
removed unused dependency, fixed integration testt to work without maven-embedder
added FIXME comment to hack in MavenUtil
fixed warnings in sopremo-common
Fixed class loader precedence to allow loading classes that depend on embedded jars
fixed bug in FunctionNode and SopremoRecordComparator
restored mvn verify for travis
Bug fixes for frontend tests.

Change-Id: I57ba84c134e45f0e15486284161f181bae145f51

Conflicts:
	meteor/meteor-webfrontend/src/main/java/eu/stratosphere/meteor/client/common/FileSystemUtility.java
	meteor/meteor-webfrontend/src/main/java/eu/stratosphere/meteor/client/common/MeteorContextHandler.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/ClientFrontendTest.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/WebFrontendTest.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/common/MeteorContextHandlerTest.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/util/LocalTestsFileSystem.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/web/AnalysisServletTest.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/web/ErrorServletTest.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/web/OtherServletTest.java
	meteor/meteor-webfrontend/src/test/java/eu/stratosphere/meteor/client/web/RuntimeStateServletTest.java
	stratosphere-dist/src/main/assemblies/bin.xml
	stratosphere-dist/src/main/assemblies/src.xml

Fix Java version

changes of hadoop version

Remove dependencies to local (.m2) stratosphere installation

Fix link to meteor-webfrontend resources