processImage is now used for images of any(!) format.
	thus the programmer has to care for the format him/herself
	the format specific functions are processImageRGBA and similar
	the same goes for PixDualObjects (processRGBA_Gray etc...)
deleted pix_fx
	the pix_fx functionality is now in GemPixObj
	this functionality is: save the image-state before it is processed
	and reconstruct it in the postrender function
	so we can change size/format and even bend the data-pointer
	and objects "before" will not notice (and crash)
revised 3 openGL objects (urgh: lots of work to do still)


git-svn-id: https://pd-gem.svn.sourceforge.net/svnroot/pd-gem/trunk/Gem@67 49b2a0ca-c541-4d49-a7ef-d785e4371512