* added clone button to the paint editbuttons (was only in the image window before)
* ctrl+clicking to set the 3d cursor also sets its depth to the face its over (much more useful when cloning and rotating the view)
* support for painting and cloning for tiled textures (for UV's outside 0-1)
* more consistant veriable names, merged image arrays into a ProjectPaintImage type to be less confusing.
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