add LLL_Flint feature: if called system(LLL_Flint, l, 1) will return
                       as a second entry also the transformation matrix
                       if called system(LLL_Flint, l, 0) will return
                       just the matrix - as system(LLL_Flint, l)
commented: FLINT_VER_2_4_5
fix: LLL_Flint
fix: more memory stuff
Added s_res_bm : benchmarking resolution computation (slower than s_res due to interpreter use)
Fix wrong RINGCHANGE attribute reading
Note on build system: Singular relinking upon changing any library!
fix minpoly handling (normal::genus)
removed wrong assume
fix: tr. #676 (simplifyIdeal did not simplify)
Merge pull request #675 from adipopescu/Flint

Flint
fix: tr. #677 by pfister
test for tr. #677
fix Hess::RiemannRochHess (example)
Fix package/namespace/exportto problem in schreyer.lib (mod_init)

chg: cleanup for s_res_bm
ring.lib: changeordTo
Fixed Printing for numstats