#186 Make all classes involved in rpc IsSerializable.
Merge branch 'master' into IsSerializable
Merge branch 'master' into IsSerializable
#117 Update db-schema pptx: add data types.
added testcase for minimal subsets
implemented method to find all minimal subsets
small code refactorings
changed return type from arraylist to TreeSet
Merge branch 'master' into SubsetGraph
Merge branch 'master' into IsSerializable
Merge branch 'master' into db-schema-description
#24 Added exception wrapping constructor to all exceptions.
#24 Use wrapper constructor if possible.
Update error messages in frontend.
#55 GetConfigurationRequirements returns an ArrayList.
Merge pull request #229 from Jens-Hildebrandt/master

added compareTo() for ColumnCombinationBitset
Merge pull request #234 from Jens-Hildebrandt/SubsetGraph

Extended subset graph
Merge branch 'master' into getConfigurationRequirement
Merge branch 'master' into WrapperExceptions
Merge branch 'master' into db-schema-description