the greatest release of all times so far, I hope ;-)

bugfix release 1.3.1

added Gaussian integer and quaternion arithemtics

SIQS with 3LP

PSIQS improved by about factor 2 in the long end

After integrating ECM, I should finally dare to call this v1.0 ...

v0.9.11: new twin prime sieve +++ guarded analysis code

v0.9.10: added port of tinyecm.c

v0.9.9.3: add HOLF, simplified FactorAlgorithm type hierarchy

v0.9.9: improved trial division & Pollard-Rho