chg: do not release semaphore 0 while waiting for links
(cherry picked from commit 2a070c518144f438f8eefc065884effa6406572f)

Signed-off-by: Andreas Steenpass <steenpass@mathematik.uni-kl.de>
Merge pull request #423 from steenpass/init_sem0_sw

chg: do not release semaphore 0 while waiting for links
debian: dir for p_Proc*so for deb
fix: syntax in m2_end
fix: mistake when given single row matrix

commit 21e5498945046a644d94b783c0fafe2cfbd8be89 in master
fix: memory leak while calling gcd with a term and a non-term poly
new: division and gcd of integer polynomials via factory

added conversion functions between integer polynomials in Singular and Factory
extended the singclap_gcd and singclap_pdivide functions to cover the case where
ground ring is integer
chg: moved all routines for tropical geometry to tropical.cc/.h
new: initialReduction