fix: better multiplication on 32bit machines
Merge pull request #196 from mmklee/factory64bitsw

fix: better multiplication on 32bit machines
chg: deleted some unused code
chg: joined precomputeLeadingCoeff from facFactorize.cc and facFqFactorize.cc
chg: deleted some unused variable
chg: made functions and variables for timings static
chg: added more timing infos to gcd functions
chg: added more timing infos to main factorization functions
chg: switch to modular gcd if psr can get dense
chg: optimization of Hi computation
chg: use modular gcd explicitly in EZ GCD mod p
chg: content computation
chg: clear denominators of A before shifting
fix: memory leak
chg: timing.h in libfac and factory now coincide
Merge pull request #198 from mmklee/factory_clean_sw

Factory clean sw
chg: new include paths of flint header due to newer version
chg: use flint in computation of univariate gcd and extgcd over Z/Q
chg: use flint in extgcd over Z/p
chg: use flint in algext
chg: use FLINT in modular resultant computation
chg: added conversion of matrices to FLINT matrices