-------------------------------------------------------------------------
IGRAB Header format v1.00
-------------------------------------------------------------------------

Value type	Label		What it is
-------------------------------------------------------------------------
int		headersize	size of entire header, huffman dictionary,
				PIC & SPRITE structure lists

long		dictionary	file offset of Huffman Dictionary
long		dataoffsets	offset list of all elements in file. Offset
				is from start of file


#define's created:
-------------------------------------------------------------------------
#define NUMFONTS	// how many fonts in file, etc.
#define NUMFONTM
#define NUMTILE8	// this is really good to use for array allocation!
#define NUMTILE8M
#define NUMTILE16
#define NUMTILE16M
#define NUMTILE32
#define NUMTILE32M
#define NUMPICS
#define NUMPICM
#define NUMSPRITES

#define STARTFONT	// index into offset list which holds file
#define STARTFONTM
#define STARTTILE8	// offset of data
#define STARTTILE8M
#define STARTTILE16
#define STARTTILE16M
#define STARTTILE32
#define STARTTILE32M
#define STARTPICS
#define STARTPICM
#define STARTSPRITES

Grabbing values:
		 Horizontal	 Vertical
Type		GRIDx	ALTx	GRIDx	ALTx
-------------------------------------------------------------------------
TILE8/m		19	36	12	21
TILE16/m	12	18	8	12
TILE32/m	7	9	4	6