Normalize font sizes for linux

[allvei]

TF2 renders font at 1.25 scale on linux due to a different DPI scaling on windows.
As a temporary fix, the script should also take care of fonts by multiplying them with 0.8 and rounding the values to the nearest integer.

Example in TF2's vanilla sourceschemebase.res

"Default"
{
	"1"
	{
		"name"		"Tahoma" [!$OSX]
		"name"		"Verdana" [$OSX]
		"tall"		"16" [!$LINUX]
		"tall"		"18" [$LINUX]
		"weight"	"500"
	}
}

[cueki]

I will add this as an optional arg. I was messing around with scaling previously and saw some awkward text clipping that prevented me from making it default.