Pass the whole exception to a wrapper exception, because e.getCause() can be null. Adapt the 'Algorithm could not be loaded'-exception.
Merge pull request #259 from HPI-Information-Systems/exceptions
Merge branch 'master' into unique_algorithm_name

Conflicts:
	testing_algorithms/example_relational_input_algorithm/target/classes/de/metanome/algorithms/testing/example_relational_input_algorithm/RelationalInputAlgorithm.class
	testing_algorithms/example_relational_input_algorithm/target/test-classes/de/metanome/algorithms/testing/example_relational_input_algorithm/RelationalInputAlgorithmTest.class
#103 Catch ConstraintViolationException when storing objects with hibernate.