fix: numberOfConesOfDimension

subprocedure for ConeCollections does not work for now,
added ensureComplex()
fix: missed assume for allowing empty bigintmats
chg: print routines for polyhedral fans

corresponds to 7add05a9a5fb7b1e61023a1b6873e366d004d453 in master
chg: print routines for polyhedral cones

corresponds to a2e8ff135c1975091940c626c92759347447fa73 in master
new: first try in polymake interface
chg: got rid of Farey in chinrem_gcd
various changes/fixes to documentation
chg: earlier switching to dense gcd
chg: arrange variables by deg if their leading coeff has the same size
fix: error when compiling with --enable-timing
chg: leave Lucks sparse lifting earlier if input is too dense
chg: order of multiplicands if their sizes differ
chg: cut off for Karatsuba
chg: added some timing infos
chg: order of multiplicands
chg: updated test results and stats of fermat_gcd_mod_*var
chg: added more tests to factorizeQ_l
chg: check for FLINT in default places by default
fix: strange libtool behaviour under Ubuntu
fix: classifyci::Semigroup (example)

from master
fix: classifyci::Semigroup (example)

from master
add: classifyci.lib to experimental libs (doc).