#204 Storing a data source returns the data source with an updated id. The id is set by the database.
Merge branch 'master' into DataSources
#204 Test return values.
Merge branch 'master' into DataSources
Merge pull request #251 from HPI-Information-Systems/DataSources

Data Sources can be deleted
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 dropdown_run_configuration
#201 Rename variables and add java docs.
Add Order Dependencies to category list box on run configuration page.