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Rename variables
Add constants for vanilla resolution
Add VGA constants
Add variable to control scaling
Revise VL_SetVGAPlaneMode
Revise initialize_video
Add function vl_get_offset
Revise VL_SetVGAPlaneMode
Revise ogl_update_screen
Revise soft_update_screen
Revise soft_refresh_screen
Revise ogl_refresh_screen
Revise JM_VGALinearFill
Revise VL_Bar
Revise VL_Plot
Revise VW_DrawPropString
Revise VL_MemToScreen
Revise VL_MaskMemToScreen
Revise Huffman expanding