Fixed implementation of the "doDetGeReal" function end enabled b25.matfunc-3 benchmark (after a temporary hack to enable correct argument passing). Disabled compilation for "Recall" function as Truffle cannot handle deeply recursive calls that way. Removed comment that was no longer applicable.

Fixes to Truffle compilation problems. Refactoring of the trufflerizer code. Updated to newer Graal version.

- drop builtin (partial)
- .Fortran (specific qr functions only)
- LinpackRFFI
- add entire New-Internal.R with unused code commented out
- add b25.bench.matcal-5 to bench harness (and correct 1,2 to use bench variant)

Enabled two additional benchmarks (after verifying that they run and produce the same output as GNU R). Partially implemented the "crossproduct" internal function.

introduce command line option to disable group generics implementation, use it when running benchmarks