add: nlClearContent
fix: mod -> %, removed INTMOD_CMD (from master)
fix: dump should not close r/w links (from master)
correction of test results due to updates of libraries

chg: no more polymake.lib, no more modStd warning
added Short/bug_newstruct3 to test suite (Short.lst)
python-related autoconf macro for pyobjects
fix: memory management in nlClearDenominator
fix: use c-% for mod and % for int
fix: mod_ now indep. of implementation details of mod
temporary disable Short/parallel_s.tst as it leaves Singular processes running
fixing bug (use of non-initialized value) in nlClearDenominators and minor improvements
chg: mod/div for bigint
fix: nlClearDenominator: less nlNormalize, positive leadcoeff
fix: div/mod stuff for paraPlanCurve: aDiv, aMod
chg: IntDiv/IntMod postponed
fix: nlClearDenom/nlContent: lead coeff >0
fix: nlContent
fix: memory leak in walk
add: extgcd for bigint
fix: npInit for large ints