ResourceRef

	Source =>	full path to source file

	Lang =>		language code to use when compiling this resource

	Uids =>		uids for this resource file (if any)

	Hdr =>		anything, indicating that a resource header file is required

	BaseTrg =>	base of target name

	TrgPath =>	target path in the emulated filesystem

	Trg =>		target name for this resource, in the form name.Rxx to match LANG

Notes;

TrgPath is filled in at the end for any resource which lacks one

If Lang is not specified, copies of this ResourceRef are made for each of the 

languages specified in the LANG statement.

Trg is constructed from the TrgPath, BaseTrg and Lang information.

BitmapRef

	Source =>	list of bitmap source references, each of the form

		Src =>		full path of BMP file

		ClDepth =>	colour depth as specified in MMP file

	TrgPath =>	target path in the emulated filesystem

	Trg =>		target name for this bitmap as specified in the MMP file

	Hdr =>		anything, indicating that a bitmap header should be generated

AifRef

	Trg =>		target name as specified in the MMP file. Defect: may include directory

	Dir =>		source path

	Resrc =>	resource file name relative to source path

	ClDepth =>	colour depth to apply to bitmap files (design defect!)

	BitMaps =>	list of bitmap files

SourceRef

	SrcPath => full path to source file

	CurFile => full source file name

	BaseTrg => base of source file name