- adjust ascender/descender values for FT1.x to avoid losing
descenders (specifically the bottom of "g" in ImUgly.ttf or
arial.ttf at 14pixels)
+ - Added tga.c to read targa images
+ - Added i_bumpmap_complex to do more accurate bumpmapping
+ - added an image type with doubles as samples
+ - change i_copy() and i_sametype() to handle double/sample images
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