SRC: added support for PNG files and Super Sleuth savestates
SRC: improved rendering (hi-res, mosaic and interlace screens, sprite RTO)
SRC: added support for DirectColor BGs to SceneViewer and MemViewer
GUI: SceneViewer now renders to 512x4?? by default, with soft blurring
GUI: added a bit more functionality to the custom file dialog windows
SRC: fixed detection of some ColorWindow settings
SRC: added code for saving and restoring the Preview window´s zoom
SRC: added check for backspace key in CartViewer
SRC: fixed saving bitmaps to clipboard from the SceneViewer
SRC: various smaller fixes and corrections