Compability changes
Merge branch 'master' of github.com:joaquinvanschoren/OpenML

Conflicts:
	Knime/org.openml.knime/bin/org/openml/knime/OpenMLWebservice$Param.class
	Knime/org.openml.knime/bin/org/openml/knime/OpenMLWebservice.class
	Knime/org.openml.knime/bin/org/openml/knime/taskloader/TaskLoaderNodeModel.class
	Knime/org.openml.knime/bin/org/openml/util/OpenMLNameSpaceContext.class
	Knime/org.openml.knime/bin/org/openml/util/OpenMLUtil.class