tests for modstd.lib
fix: ssi: qring+extRing
better error message: access object from other rings in newstruct
removed currQuotient
fix: tests for "removed currQuotient"/modstd
fix: tr.616 (#include)
chg: feVoices: kernel/structs.h ->Singular/fevoices.h
chg: nNeg -> nInpNeg, also n_InpNeg, cfInpNeg
fixed corner case (minimal resolution very short) in AnnExt_R
Tests for AnnExt_R corner case added
add: requirement for contributed libs
fix: ssi: sending OrdSgn==-1
Merge pull request #586 from surface-smoothers/patch-AnnExt_R_Bug

Patch ann ext r bug
chg: make sqrf_norm_sub return non-sqrfree norm if wished
chg: do not waste non-sqrfree norm
chg: better docu and function naming
chg: move IntGenerator from facAlgFuncUtil to cf_generator
chg: added a function to compute the norm
chg: use a not necessarily squarefree norm in factorization over number fields
fix: bug in removeFactors
chg: improved normalize