- only call FT_Get_Postscript_Name() on FT 2.0.6 and later

	- only call FT_Get_Postscript_Name() on FT 2.0.6 and later
	- put the IM_LIBPATH and IM_INCPATH values first in the search
	  path so the builder gets their local versions if desired rather
	  than the system versions they might be trying to avoid
	- document the exp() and log() transform2() functions
	- document the constants normally set by transform2().