Summary
- support for libgmp on x86_64-darwin;
- avoid slow IntInf.pow in Poly/ML 5.7.1 testing version, e.g. relevant for AFP/Lorenz_C0;
- delegate boundary cases to existing IntInf.pow;
- plain identify job for Isabelle + AFP, independent of any Isabelle technology;
- tuned (non-unique example);
- clarified situation of global theory names;
- less global theories -- avoid confusion about special cases;