ResultContainer: has become slimmer. Has been reduced to processing the ResultSet of an executed query in order to produce an object matrice (Vector<Vector<Object>>) containing all table data. It's processed in processResultSet()
Matrice is held persistently by the ResultContainer for later processing, accessible under resultTable()
Added method arrayListOfColumn(int columnNumber) to get all rows of a specific column - NEEDS TO BE TESTED SOON.

DbWrapper: Added method arrayListOfColumn(int columnNumber) to get all rows of a specific column - NEEDS TO BE TESTED SOON.
ResultContainer shall now be used properly within the wrapper.
sendQuery now sets closeOnCompletion() on the statement object in order to closing the statement when all referenced ResultSets have been closed down after processing.