add: string(b) for blackbox type b in the default methods'(Singular/blackbox.cc)

from master
chg: sigaction instead of signachg: sigaction instead of signal

from master
chg: set blocks to keep to 0 for OM_NDEBUG or __OPTIMIZE__
fix: iiLibCmd -> jjLOAD in grammar.y

from master
fix: jjLOAD from master
avoid autoloading of non-pacakges

from master
fix: omalloc -> omAlloc

from master
removed ChangeLog*
fix: compiler warning
opt: omfree -> omFree
fix: default proc for cfCoeffIsEqual
Fix the remaining wrongs due to API change: PrintS+StringAppendS -> PrintS+StringEndS!
fix: prefer reduce(module,ideal) over reduce(module,module)

from master
chg: n_Farey, p_Farey, p_ChineseRemainder

from master
fix: Long/locnomal.tst
opt: avoid pAdd, use pReverse in chinrem

from master
Fixing the use of pTest in libpolys (use p_Test(.., RING) instead)