Generating doubled dumps

[zesinger]

When dumps are generated with

[rawoutput]

; if enabled, write all frames to VPM's dmddump folder.
enabled = true

in the dmddevice.ini, if

; scaler mode for standard content (vpm frames): none, doubler, scale2x.
; note: see readme.md for details
scalermode = none

is set to either doubler or scale2x, 128x16 roms are saved as 256x32, 128x32 ones are saved as 256x64 (192x64 ones remain 192x64).
If scalermode = none, they are not doubled.