fix: make check test of factory without Singular
fix: standalone build of factory
chg: use NTL/FLINT also in operator /=
chg: update test results for Short/factorizeQ_s.tst
add: factoryVersion as part of extended version info
Merge pull request #531 from mmklee/factory_noPP

Factory no pp
update HOWTO for libsingular
fix: test for make check in case Singular is not around
chg: separate omalloc and resources flags