More MACH-O signatures
Added FLAGS,LIBS output for debugging

Show (due to '-v') more _CFLAGS/_LIBS for factory, ntl, gmp, flint
Assure that config.h was generated on 'compatible' cpu (same size of long)
Pyobjects are in a dynamic module as well
Fixed pure python-related test
Added '$Id$' as a comment to all libs (LIB/*.lib)
Use -Wl,-Bdynamic on cygwin...

NOTE: LIBPREFIX seems to be obsolette... TODO!
More output by the test in Singular/
More datails abount Singular build (-v)