Added ClassUtility
Tiny performance fix
Merge branch 'task3' into task4
Merge branch 'task4' into task5
Implemented TableRow & TableSignature
Changed primitive types for classes
Added null column class handling
Changed Class for Class<?>
Added code for reading signature.tsv & StructuredTable finally implemented
Added TODOs
Implemented static method TableSignature.forTable
Removed tableFile from constructor's arguments in StructuredTable
Added class to string conversion
Implemented readFromFile and writeToFile in TableSignature
Rewrite signature.tsv reading with the help of TableSignature.readFromFile()
Implemented TableRow.deserialize
Implemented StructuredDatabase.deserialize