CollectionView: fixed resizing bug
MainWindow: code cleanup, started Collection's management
CollectionInfo: fixed prototype code
Collection: added info methods
Collection: added product methods
MainWindow: changed layout, added security checks
PreferencesManager: better handling of home dir
base.renderer: created package to manage the rendering subsystem
DataRegisterer: created blank file
Data*: started trully coding the subsystem
Renderer: moved to base.renderer