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2.0

Added comparison to the theoretical folded histogram.  The heuristics
are now based on variance from this distribution, and not solely on
the histogram of a given picture.

This method actually works.  The previous methods were, well, ad-hoc.

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1.3

Output pixel frequency graphs, too.  Some better heuristics.

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1.2

Output annotated pictures with marked progressively real/unreal areas.
3x speedup, as pointed out by Rene Scharfe <lsr@firemail.de>

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1.1

Added some better heuristics for weeding out unreal images.  It now
might mis-classify some realistic pictures as "real", but it shouldn't
classify any unreal pictures incorrectly as real.

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1.0
	The first public release of Isreal.