chg: rewrote convex dense compression with mpz_t
chg: deleted unused code
chg: changes due to rewritting
chg: print routines for polyhedral fans
chg: print routines for polyhedral cones
chg: deactivated two procedures of polymake.so, which clashed with gfanlib
Merge pull request #334 from YueRen/gfanlib

Gfanlib-printing
Merge pull request #330 from mmklee/factory_newtonpolygon

Factory newtonpolygon
add: docu. for load(<string>,"with")
add: initial stuff for apply
add: det for bigintmat

from spielwiese
chg: staticdemo
chg: simplified nlNormalize
chg: simplified luDecomp
fix: memory leak while dividing a short number by 1