fix: primeFactorization redone with trial dvivision/Pollard-Rho from gmp

Conflicts:

	Singular/misc_ip.cc
fix: primefactors(): result and algorithm, bound enabled again

Conflicts:

	Singular/ChangeLog
	Singular/iparith.cc
fix: primeFactorization: bound
fix: freebsd port
fix: bad condition
Merge pull request #256 from mmklee/sw_fix

Sw fix