Allow floating point optimizations for Clozure CL 1.8 and up.
Fix problem with gcl-2.6.9 and up.
Compile Clozure CL GMP support only on AMD64.
Makefile cleanup.
With ECL by default use safety 0.
Add primitive for DoubleFloat abs.
Misc cleanups.
Clean up of build system.
Really use Lisp type declarations.