Revise VW_DrawPropString
Make rendering non-thread
Add update rectangles
Revise VW_Plot
Revise VW_Bar
Revise VWB_Bar
Remove pansx and pansy
Merge FizzleFade
Revise VW_UpdateScreen
Revise VW_MarkUpdateBlock and sdl_soft_update_screen
Update release settings
Revise FizzleFade
Revise update rectangles
Revise VW_DrawPropString
Update scan codes
Add method to_upper
Add handling of keyboard events