add: use currRing in ssi-fork-links
fix: absfact tests
Merge pull request #486 from mmklee/factory_flint24_sw

Factory: replacing NTL via flint24
add: provide fetch and imap for Z/p(a) <--> Q(a)
add: ssi for alg. and trans. extensions
add: chinese remainder for alg./trans. extensions
add: farey for alg./trans. extensions
fix: access to chinese remainder, normalization of results
fix: kronecker multiplication over Fq
fix: bug in modular multiplication over Q(a)
chg: more tests for factorization
chg: update test results
chg: earlier check for divisibility in EZGCD
chg: more tests for gcd
chg: removed/disable dead code
chg: disabled dead code
chg: disabled dead code for factorization
chg: due to removal of old factorization code
chg: disable unused variants of functions
chg: disable some matrix nonsense