Modified 'Receiver' class to implement 'Cloneable' interface.
Updated constructor for class 'RoomMap'.
Updated class 'HardcodedMapDAO'.
Fixed a bug in 'HardcodedReceiverDAO' class.
Updated 'COMPortDataRedader' class.
Updated 'COMPortDataReaderRunnable' class.
Updated 'DatabaseDataWriter' class. It now overrides method from
'DataWriter' interface.
Updated 'DatabaseDataWriterRunnable' class.
Added method 'stopReading' to interface 'DataReader'.
Added method 'stopWriting' to 'DataWriter' interface.
Updated 'FileDataReader' class.
Added possibility to instantiate algorithm with current RoomMap object
in class 'AddMapDialog'.
Updated 'MainFrame' class.
Updated 'MapItem' class. Now the parent object (instance of 'MapsPanel')
removes 'MapItem' object, instead of it removing itself.
Fixed a bug when saving an image. Updated methods 'setPreviewImage',
'refreshPreviewImage' and 'getMap'.
Extracted deletion of MapItems to MapsPanel, instead of doing it from
MapItem object.
Added menu 'Receivers' and menu items for editing receivers.
Updated 'ParametersPanel' class.
Updated 'ReceiversPanel' class.
Added fields 'dataReader' and 'dataWriter' to class 'Application'.