Fourth Draft "Unsafe fp optimizations" project description.

[Gabriel Dos Reis]

As far as as C99 and IEEE-754 are concerned, please note that the
complex arithmetic part is a C99 invention and not all agree with
those inventions -- we had had recently a dicussion on that topic on
the C/C++ compatibility reflector, and a DR was filled.

C++ seems to rely on LIA standards (as reflected in numeric_limits<>
specification) and the sentiment (after the above mentionned
discussion) is to follow LIA standards in future revision of C++.

LIA-3 (complex arithmetic) is in a drafting-stage,

	http://www.dkuug.dk/jtc1/sc22/wg11/docs/n476.pdf

-- Gaby
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