Fixed the machine precision version of fastMult2Pow to properly set the sign of the power of two Added support for negative exponents for the mpfr version of fastMult2Pow
Fixed the machine precision version of fastMult2Pow to properly set the sign of the power of two
Added support for negative exponents for the mpfr version of fastMult2Pow

mfdeakin/Geometry,mfdeakin/Geometry,mfdeakin/Geometry,mfdeakin/Geometry