chg: deleted old packages for convex geometry in Singular
chg: updated gfanlib package to newest version in master
new: newest version of callgfanlib package as master branch

also includes minor changes in bigintmat to allow empty matrices
and a new function which returns the regular print output as char*
(necessary for the print routines of the convex objects)
Added automake BuildSystem
Merge pull request #307 from malex984/gfanlib

Gfanlib