improved error description when NTL is missing
Update cf_factor.cc

corrected spelling
chg: better assertions in factorize and deletion of SW_USE_NTL
chg: deleted SW_USE_NTL from cf_switches and misc_ip
chg: deleted SW_USE_NTL_GCD_*
fix: minbase does not work for rings as coefficient
Merge pull request #537 from mmklee/factory_emsg

Factory emsg
fix: syntax of debug version (factory/cf_factor.cc)
Merge branch 'spielwiese' of github.com:Singular/Sources into spielwiese