#134 Added Services for FileInput and TableInput.
#134 Made FileInput, TableInput and DatabaseConnection Serializable.
#134 Added new service to gwt.xml and web.xml files.
#134 Updated TestHelper: List all TableInputs, FileInputs, DatabaseConnections.
#134 Implemented saving of input.
#134 Added info label if input successfully stored and fixed some minor things when saving inputs.