fix: tr. #673
revisiting kutil/for ringcf: cleanup
make it painless to add -DSINGULAR_4_1 to CPPFLAGS for configure
Fix bug in nAESetMap : nAECopyMap is not defined (replaced with ndCopyMap)
doc: rank(M,1)
Fix schreyer.lib: documentation & exports & cleanup & testing
residue class and polynimials
additional tests: factmodd
kstd1/kutil: clean r->OrdSgn: rHasGlobalOrdering
warnings: fixed finvar.lib, rModifyRing, wrong assume in gnumpc.cc
warnings: fixed finvar.lib, algebra.lib
warnings: fixed Short/scharz*tst
Documentation for schreyer.lib
fix: includes for SINGULAR_4_1
fix: memory leak: assign list-elem to newstruct
fix simplifyIdeal (char 2)
fix: tr. #674
additional test for lduSolve
revisiting kstd1::red*: cleanup
use standard names: int_number -> mpz_prt, NATNUMBER ->unsigned long